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WIREs Clim Change

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Drought under global warming: a review

Advanced Review

Aiguo Dai

Published Online: Oct 19 2010

DOI: 10.1002/wcc.81

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Abstract This article reviews recent literature on drought of the last millennium, followed by an update on global aridity changes from 1950 to 2008. Projected future aridity is presented based on recent studies and our analysis of model simulations. Dry periods lasting for years to decades have occurred many times during the last millennium over, for example, North America, West Africa, and East Asia. These droughts were likely triggered by anomalous tropical sea surface temperatures (SSTs), with La Niña‐like SST anomalies leading to drought in North America, and El‐Niño‐like SSTs causing drought in East China. Over Africa, the southward shift of the warmest SSTs in the Atlantic and warming in the Indian Ocean are responsible for the recent Sahel droughts. Local feedbacks may enhance and prolong drought. Global aridity has increased substantially since the 1970s due to recent drying over Africa, southern Europe, East and South Asia, and eastern Australia. Although El Niño‐Southern Oscillation (ENSO), tropical Atlantic SSTs, and Asian monsoons have played a large role in the recent drying, recent warming has increased atmospheric moisture demand and likely altered atmospheric circulation patterns, both contributing to the drying. Climate models project increased aridity in the 21st century over most of Africa, southern Europe and the Middle East, most of the Americas, Australia, and Southeast Asia. Regions like the United States have avoided prolonged droughts during the last 50 years due to natural climate variations, but might see persistent droughts in the next 20–50 years. Future efforts to predict drought will depend on models' ability to predict tropical SSTs. WIREs Clim Change 2011 2 45–65 DOI: 10.1002/wcc.81 This article is categorized under: Paleoclimates and Current Trends > Detection and Attribution Paleoclimates and Current Trends > Modern Climate Change Assessing Impacts of Climate Change > Evaluating Future Impacts of Climate Change Assessing Impacts of Climate Change > Observed Impacts of Climate Change

Time series of the tree‐ring reconstructed PDSI (<−1 for drought) averaged over western North America (25°–50°N, 95°–125°W) from 1000 to 2003 AD (Reprinted with permission from Ref 49.)

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Mean annual sc‐PDSI_pm for years (a) 1950–1959, (b) 1975–1984, (c) 2000–2009, (d) 2030–2039, (e) 2060–2069, and (f) 2090–2099 calculated using the 22‐model ensemble‐mean surface air temperature, precipitation, humidity, net radiation, and wind speed used in the IPCC AR4 from the 20th century and SRES A1B 21st century simulations.128 Red to pink areas are extremely dry (severe drought) conditions while blue colors indicate wet areas relative to the 1950–1979 mean.

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Multi‐model mean changes from 1980–1999 to 2080–2099 under the SRES A1B scenario in annual (a) precipitation (mm/day), (b) soil moisture (%), (c) runoff (mm/day), and (d) evaporation (mm/day). The stippling indicates where at least 80% of the models agree on the sign of the mean change. (Reprinted with permission from Ref 114. Copyright 2007 Cambridge University Press.)

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Time series of global dry areas (defined locally as the bottom 20 percentiles) as a percentage of the global (60°S–75°N) land area based on the CLM3‐simulated top‐1 m soil moisture content (green), and PDSI calculated with both observed precipitation and temperature and Thornthwaite (red solid line) and Penman‐Monteith (magenta solid line) PE, and with precipitation only (dashed lines). Monthly data were used in the PDSI and PE calculations with variations on <12‐month time scales were filtered out before plotting.

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Global land (60°S–75°N) averaged annual time series of top 1 m soil moisture anomaly (mm) simulated by a land surface model (CLM3) forced with observation‐based estimates of monthly temperature, precipitation, and solar radiation with intra‐monthly variations from the NCEP‐NCAR (black) and ERA‐40 (green) reanalysis (see Ref 29 for details), compared with the similarly averaged PDSI time series computed with both observed temperature and precipitation (red solid line for PDSI with Thornthwaite PE and magenta for PDSI with Penman‐Monteith PE) and precipitation only (i.e., no temperature changes, dashed lines). Results for averages over 40°S–40°N land areas are very similar. The SC‐PDSI_pm is similar to the PDSI_pm.

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Maps of annual trends (red = drying) from 1950 to 2008 in PDSI (change per 50 years) with potential evapotranspiration (PE) calculated using the (a) Thornthwaite and (b) Penman‐Monteith (PM) equation, and (c) annual trends in self‐calibrated PDSI with the PM potential evaporation. Also shown (d) is the trend in top‐1 m soil moisture content (mm/50 years) from 948 to 2004 simulated by a land surface model (CLM3) forced by observation‐based atmospheric forcing (see Ref 29 for details).

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(left) Temporal (black) and (right) spatial patterns of the two leading EOFs of monthly PDSI from 1900 to 2008 (normalized by its standard deviation prior to the EOF analysis). Red (blue) areas are dry (wet) for a positive temporal coefficient on the corresponding PC time series [e.g., the red (blue) areas in panel (b) represent a drying (moistening) trend whose temporal pattern is shown in panel (a)]. Variations on <2‐year time scales were filtered out in plotting the left panels (but retained in the EOF analysis). Also shown in panel (c) is the normalized Darwin mean sea‐level pressure anomaly shifted to the right (i.e., lead) by 6 months to obtain a maximum correlation (r = 0.63) with the PC 2 time series. (a) The percentage variance explained by the EOF is shown on the top of the left panels.

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Trend maps for observed annual (a) surface air temperature (from HadCRUT3: http://www.cru.uea.ac.uk/cru/data/temperature/), (b) precipitation (see text for data sources), and (c) runoff inferred from streamflow records. (Panel c reprinted with permission from Ref 99. Copyright 2002 American Meteorological Society.)

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Historical fluctuations in African lake levels since 1800 (higher values for wet periods). Except for Lake Ngami, solid lines indicate modern measurements, short dashed lines indicate historical information, and long dashed lines indicate general trends. (Reprinted with permission from Ref 79. Copyright 2001 Springer.)

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Annual time series averaged over the Sahel (18°W–20°E, 10°N–20°N, land only) for observed precipitation from 1921 to 2008 (black), Palmer Drought Severity Index (PDSI) (red) and CLM3‐simulated top‐1 m soil moisture content (green). The precipitation and soil moisture are shown as normalized anomalies in units of standard deviation (SD).

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Time series of percentage area (left ordinate) and actual area (right ordinate) over eastern China (22°–40°N, 105°–122°E) in very dry conditions (severe drought or worse) during the last five centuries, created using GIS technique based on the network of the drought/flood index in China of Zhang et al.55 Severe, extreme, and exceptional drought years stand out, with area percentages reaching 20, 30 and 40%, respectively. (Reprinted with permission from Ref 74. Copyright 2007 Springer.)

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References

Sun, Y, Solomon, S, Dai, A, Portmann, R. How often does it rain? J Clim 2006, 19:916–934.
American Meteorological Society (AMS). Meteorological drought—policy statement. Bull Amer Meteor Soc 1997, 78:847–849. Available at: http://www.ametsoc.org/policy/drought2.html.
Wilhite, DA. Drought as a natural hazard: concepts and definitions. In: Wilhite, DA, ed. Droughts: Global Assessment. London: Routledge; 2000, 3–18.
Giannini, A, Saravanan, R, Chang, P. Oceanic forcing of Sahel rainfall on interannual to interdecadal time scales. Science 2003, 302:1027–1030.
Schubert, SD, Suarez, MJ, Pegion, PJ, Koster, RD, Bacmeister, JT. On the cause of the 1930s Dust Bowl. Science 2004, 303:1855–1859.
Hoerling, M, Hurrell, J, Eischeid, J, Phillips, A. Detection and attribution of twentieth‐century northern and southern African rainfall change. J Clim 2006, 19:3989–4008.
Trenberth, KE, Branstator, GW, Arkin, PA. Origins of the 1988 North‐American drought. Science 1988, 242:1640–1645.
Cook, BI, Miller, RL, Seager, R. Amplification of the North American “Dust Bowl” drought through human‐induced land degradation. Proc Natl Acad Sci 2009, 106:4997–5001.
Federal Emergency Management Agency (FEMA). National Mitigation Strategy: Partnerships for Building Safer Communities. Mitigation Directorate, p. 2, Washington, DC: Federal Emergency Management Agency; 1995, 40.
Kallis, G. Droughts. Annu Rev Env Resour 2008, 33:85–118.
Stahle, DW, Fye, FK, Cook, ER, Griffin, RD. Tree‐ring reconstructed megadroughts over North America since AD 1300. Clim Change 2007, 83:133–149.
Meehl, GA, Hu, A. Megadroughts in the Indian monsoon region and southwest North America and a mechanism for associated multidecadal Pacific sea surface temperature anomalies. J Clim 2006, 19:1605–1623.
Seager, R, Burgman, R, Kushnir, Y, Clement, A, Cook, ER, Naik, N, Miller, J. Tropical Pacific forcing of North American Medieval megadroughts: testing the concept with an atmosphere model forced by coral‐reconstructed SSTs. J Clim 2008, 21:6175–6190.
McCabe, GJ, Betancourt, JL, Gray, ST, Palecki, MA, Hidalgo, HG. Associations of multi‐decadal sea‐surface temperature variability with US drought. Quatern Int 2008, 188:31–40.
Mo, KC, Schemm, JKE, Yoo, SH. Influence of ENSO and the Atlantic multidecadal oscillation on drought over the United States. J Clim 2009, 22:5962–5982.
Mendez, M, Magana, V. Regional aspects of prolonged meteorological droughts over Mexico and Central America. J Clim 2010, 23:1175–1188.
Shuttleworth, WJ. Evaporation. In: Maidment, DR, ed. Handbook of Hydrology. New York: McGraw‐Hill, Inc.; 1993, 4.1–4.53.
Heim, RR Jr. Drought indices: a review. In: Wilhite, DA, ed. Drought: A Global Assessment. London: Routledge; 2000, 159–167.
Heim, RR Jr. A review of twentieth‐century drought indices used in the United States. Bull Am Met Soc 2002, 83:1149–1165.
Keyantash, J, Dracup, JA. The quantification of drought: an evaluation of drought indices. Bull Am Met Soc 2002, 83:1167–1180.
Hayes, MJ. Drought indices. What Is Drought? Lincoln, Nebraska: National Drought Mitigation Center, 2006. Available at: http://drought.unl.edu/whatis/indices.htm.
Palmer, WC. Meteorological drought. Research Paper No. 45, US Dept. of Commerce, 1965, 58. Available at: http://www.ncdc.noaa.gov/oa/climate/research/drought/palmer.pdf.
Alley, WM. Palmer drought severity index: limitations and assumptions. J Clim Appl Meteorol 1984, 23:1100–1109.
Karl, TR. Sensitivity of the Palmer drought severity index and Palmer`s Z‐index to their calibration coefficients including potential evapotranspiration. J Clim Appl Meteorol 1986, 25:77–86.
McKee, TB, Doesken, NJ, Kleist, J. The relationship of drought frequency and duration to time scales. Preprints, 8th Conference on Applied Climatology, January 17–22 Anaheim, CA: 1993, 179–184. Available at: http://ccc.atmos.colostate.edu/relationshipofdroughtfrequency.pdf.
Edwards, DC, McKee, TB. Characteristics of 20th century drought in the United States at multiple time scales. Climo Report 97‐2, Dept. of Atmos. Sci., CSU, Fort Collins, CO, May, 1997, 155. Available at: http://ccc.atmos.colostate.edu/edwards.pdf.
Gibbs, WJ, Maher, JV. Rainfall deciles as drought indicators. Aust Bureau Meteorol Bull 1967, 48:37.
Huang, J, van den Dool, H, Georgakakos, KP. Analysis of model‐calculated soil moisture over the United States (1931–93) and application to long‐range temperature forecasts. J Clim 1996, 9:1350–1362.
Qian, T, Dai, A, Trenberth, KE, Oleson, KW. Simulation of global land surface conditions from 1948–2004. Part I: Forcing data and evaluation. J Hydrometeorol 2006, 7:953–975.
Wang, AH, Bohn, TJ, Mahanama, SP, Koster, RD, Lettenmaier, DP. Multimodel ensemble reconstruction of drought over the continental United States. J Clim 2009, 22:2694–2712.
Dracup, JA, Lee, KS, Paulson, EG. On the definition of droughts. Water Resour Res 1980, 16:297–302.
Shafer, BA, Dezman, LE. Development of a surface water supply index (SWSI) to assess the severity of drought conditions in snowpack runoff areas. In: Proc Western Snow Conference, Colorado State University, Fort Collins, Colorado; 1982, 164–175.
Doesken, NJ, McKee, TB, Kleist, J. Development of a surface water supply index for the Western United States. Climo Report 91‐3, Dept. of Atmos. Sci., CSU, Fort Collins, CO, November, 1991, 80. Available at: http://climate.colostate.edu/pdfs/climo_rpt_91‐3.pdf.
Bhalme, HN, Mooley, DA. Large‐scale droughts/floods and monsoon circulation. Mon Weather Rev 1980, 108:1197–1211.
Dai, A, Trenberth, KE, Karl, TR. Global variations in droughts and wet spells: 1900–1995. Geophys Res Lett 1998, 25:3367–3370.
Dai, A, Trenberth, KE, Qian, T. A global dataset of Palmer Drought Severity Index for 1870–2002: relationship with soil moisture and effects of surface warming. J Hydrometeorol 2004, 5:1117–1130.
Burke, EJ, Brown, SJ, Christidis, N. Modeling the recent evolution of global drought and projections for the twenty‐first century with the Hadley centre climate model. J Hydrometeorol 2006, 7:1113–1125.
Burke, EJ, Brown, SJ. Evaluating uncertainties in the projection of future drought. J Hydrometeorol 2008, 9:292–299.
Cook, ER, Meko, DM, Stahle, DW, Cleaveland, MK. Drought reconstructions for the continental United States. J Clim 1999, 12:1145–1162.
Cook, ER, Woodhouse, CA, Eakin, CM, Meko, DM, Stahle, DW. Long‐term aridity changes in the western United States. Science 2004, 306:1015–1018.
Guttman, NB, Wallis, JR, Hosking, JRM. Spatial comparability of the Palmer Drought Severity Index. Water Resour Bull 1992, 28:1111–1119.
Wells, N, Goddard, S, Hayes, MJ. A self‐calibrating Palmer Drought Severity Index. J Clim 2004, 17:2335–2351.
van der Schrier, G, Briffa, KR, Jones, PD, Osborn, TJ. Summer moisture variability across Europe. J Clim 2006, 19:2818–2834.
van der Schrier, G, Briffa, KR, Osborn, TJ, Cook, ER. Summer moisture availability across North America. J Geophys Res 2006, 111:D11102. doi:11110.11029/12005JD006745.
Hobbins, MT, Dai, A, Roderick, ML, Farquhar, GD. Revisiting potential evapotranspiration parameterizations as drivers of long‐term water balance trends. Geophys Res Lett 2008, 35:L12403. doi:10.1029/2008GL033840.
Thornthwaite, CW. An approach toward a rational classification of climate. Geogr Rev 1948, 38:55–94.
Donohue, RJ, McVicar, TR, Roderick, ML. Assessing the ability of potential evaporation formulations to capture the dynamics in evaporative demand within a changing climate. J Hydrol 2010, 386:186–197.
Cook, ER, Seager, R, Cane, MA, Stahle, DW. North American drought: reconstructions, causes, and consequences. Earth‐Sci Rev 2007, 81:93–134.
Herweijer, C, Seager, R, Cook, ER, Emile‐Geay, J. North American droughts of the last millennium from a gridded network of tree‐ring data. J Clim 2007, 20:1353–1376.
Seager, R, Tzanova, A, Nakamura, J. Drought in the southeastern United States: causes, variability over the last millennium, and the potential for future hydroclimate change. J Clim 2009, 22:5021–5045.
Seager, R, Ting, M, Davis, M, Cane, M, Naik, N, Nakamura, J, Li, C, Cook, ER, Stahle, DW. Mexican drought: an observational modeling and tree ring study of variability and climate change. Atmosfera 2009, 22:1–31.
CNMA (Chinese National Meteorological Administration). Yearly Charts of Dryness/Wetness in China for the Last 500‐Year Yeriod. Beijing: Chinese Cartographic Publishing House; 1982, 332.
Wang, SW, Zhao, ZC, Chen, ZH, Tang, ZG. Drought‐flood variations for the last two thousand years in China and comparison with global climatic change. In: Ye, DZ, Fu, CB, Chao, JP, Yoshino, M, eds. The Climate of China and Global Climate. Springer Berlin Heidelberg New York: China Ocean Press; 1987, 20–29.
Qian, WH, Hu, Q, Zhu, YF, Lee, DK. Centennial‐scale dry‐wet variations in East Asia. Clim Dyn 2003, 21:77–89.
Zhang, D, Li, X, Liang, Y. Supplement of yearly charts of dryness/wetness in China for the last 500‐year period, 1993–2000. J Appl Meteorol Sci 2003, 14:379–389.
Zou, XK, Zhai, PM, Zhang, Q. Variations in droughts over China: 1951–2003. Geophys Res Lett 2005, 32:L04707. doi:04710.01029/02004GL021853.
Davi, NK, Jacoby, GC, Curtis, AE, Bachin, B. Extension of drought records for central Asia using tree rings: west central Mongolia. J Clim 2006, 19:288–299.
Xin, X, Yu, R, Zhou, TJ, Wang, B. Drought in late spring of South China in recent decades. J Clim 2006, 19:3197–3206.
Zhang, Q, Gemmer, M, Chen, JQ. Climate changes and flood/drought risk in the Yangtze Delta, China, during the past millennium. Quatern Int 2008, 176:62–69.
Fang, KY, Gou, XH, Chen, FH, Yang, MX, Li, JB, He, MS, Zhang, Y, Tian, QH, Peng, JF. Drought variations in the eastern part of northwest China over the past two centuries: evidence from tree rings. Clim Res 2009, 38:129–135.
Li, JB, Cook, ER, D`arrigo, RD, Chen, FH, Gou, XH. Moisture variability across China and Mongolia: 1951–2005. Clim Dyn 2009, 32:1173–1186.
Chen, FH, Chen, JH, Holmes, J, Boomer, I, Austin, P, et al. Moisture changes over the last millennium in arid central Asia: a review, synthesis and comparison with monsoon region. Quat Sci Rev 2010, 29:1055–1068.
Cook, ER, Anchukaitis, KJ, Buckley, BM, D`Arrigo, RD, Jacoby, GC, Wright, WE. Asian monsoon failure and megadrought during the last millennium. Science 2010, 328:486–489.
Zhai, JQ, Su, B, Krysanova, V, Vetter, T, Gao, C, Jiang, T. Spatial variation and trends in PDSI and SPI indices and their relation to streamflow in ten large regions of China. J Clim 2010, 23:649–663.
Touchan, R, Anchukaitis, KJ, Meko, DM, Attalah, S, Baisan, C, Aloui, A. Long term context for recent drought in northwestern Africa. Geophys Res Lett 2008, 35:L13705. doi:13710.11029/ 12008GL034264.
Shanahan, TM, Overpeck, JT, Anchukaitis, KJ, Beck, JW, Cole, JE, Dettman, DL, Peck, JA, Scholz, CA, King, JW. Atlantic forcing of persistent drought in West Africa. Science 2009, 324:377–380.
Nicholls, N. The changing nature of Australian droughts. Clim Change 2004, 63:323–336.
Kiem, AS, Franks, SW. Multi‐decadal variability of drought risk, eastern Australia. Hydrol Process 2004, 18:2039–2050.
Cole, JE, Overpeck, JT, Cook, ER. Multiyear La Niña events and persistent drought in the contiguous United States. Geophys Res Lett 2002, 29:1647. doi:1610.1029/2001GL013561.
Seager, R, Kushnir, Y, Herweijer, C, Naik, N, Velez, J. Modeling of tropical forcing of persistent droughts and pluvials over western North America: 1856–2000. J Clim 2005, 18:4068–4091.
Schubert, SD, Gutzler, D, Wang, HL, Dai, A, Delworth, T, et al. A US CLIVAR project to assess and compare the responses of global climate models to drought‐related SST forcing patterns: overview and results. J Clim 2009, 22:5251–5272.
Findell, KL, Delworth, TL. Impact of common sea surface temperature anomalies on global drought and pluvial frequency. J Clim 2010, 23:485–503.
Herweijer, C, Seager, R. The global footprint of persistent extra‐tropical drought in the instrumental era. Int J Climatol 2008, 28:1761–1774.
Shen, C, Wang, WC, Hao, Z, Gong, W. Exceptional drought events over eastern China during the last five centuries. Clim Change 2007, 85:453–471.
Hu, Q, Feng, S. A southward migration of centennial‐scale variations of drought/flood in eastern China and the western United States. J Clim 2001, 14:1323–1328.
Zhou, TJ, Gong, DY, Li, J, Li, B. Detecting and understanding the multi‐decadal variability of the East Asian Summer Monsoon ‐ Recent progress and state of affairs. Meteorol Z 2009, 18:455–467.
Li, H, Dai, A, Zhou, TJ, Lu, J. Response of East Asian summer monsoon to historical SST and atmospheric forcing during 1950–2000. Clim Dyn 2010, 34:501–514.
Nicholson, SE. Climatic and environmental change in Africa during the last two centuries. Climate Res 2001, 17:123–144.
Nicholson, SE, Yin, X. Rainfall conditions in equatorial East Africa during the nineteenth century as inferred from the record of Lake Victoria. Clim Change 2001, 48:387–398.
Hulme, M, Doherty, R, Ngara, T, New, M, Lister, D. African climate change: 1900–2100. Clim Res 2001, 17:145–168.
Dai, A, Lamb, PJ, Trenberth, KE, Hulme, M, Jones, PD, Xie, P. The recent Sahel drought is real. Int J Climatol 2004, 24:1323–1331.
Folland, CK, Palmer, TN, Parker, DE. Sahel rainfall and worldwide sea temperatures, 1901–85. Nature 1986, 320:602–607.
Lamb, PJ, Peppler, RA. Further case studies of tropical Atlantic surface atmospheric and oceanic patterns associated with sub‐Saharan drought. J Clim 1992, 5:476–488.
Giannini, A, Biasutti, M, Verstraete, MM. A climate model‐based review of drought in the Sahel: desertification, the re‐greening and climate change. Glob Planetary Change 2008, 64:119–128.
Hagos, SM, Cook, KH. Ocean warming and late‐twientieth‐century Sahel drought and recovery. J Clim 2008, 21:3797–3814.
Lu, J. The dynamics of the Indian Ocean sea surface temperature forcing of Sahel drought. Clim Dyn 2009, 33:445–460.
Charney, JG. Dynamics of deserts and drought in the Sahel. Q J R Meteorol Soc 1979, 101:193–202.
Zeng, N, Neelin, JD, Lau, KM, Tucker, CJ. Enhancement of interdecadal climate variability in the Sahel by vegetation interaction. Science 1999, 286:1537–1540.
Nicholson, S. Land surface processes and Sahel climate. Rev Geophys 2000, 38:117–139.
IPCC climate change 2007: the physical science basis. In: Solomon, S, Qin, D, Manning, M, Chen, Z, Marquis, M, Averyt, KB, Tignor, M, Miler, HL, eds. Contribution of Working Group I to the Fourth Assessment Report of the International Panel on Climate Change Program. Cambridge, UK/New York, USA: Cambridge University Press; 2007, 996.
Lloyd‐Hughes, B, Saunders, MA. A drought climatology for Europe. Int J Climatol 2002, 22:1571–1592.
Groisman, PY, Knight, RW, Karl, TR, Easterling, DR, Sun, B, Lawrimore, JH. Contemporary changes of the hydrological cycle over the contiguous United States: trends derived from in situ observations. J Hydrometeorol 2004, 5:64–85.
Qian, T, Dai, A, Trenberth, KE. Hydroclimatic trends in the Mississippi River basin from 1948 to 2004. J Clim 2007, 20:4599–4614.
Zhu, CM, Lettenmaier, DP. Long‐term climate and derived surface hydrology and energy flux data for Mexico: 1925–2004. J Clim 2007, 20:1936–1946.
Sheffield, J, Wood, EF. Global trends and variability in soil moisture and drought characteristics, 1950–2000, from observation‐driven simulations of the terrestrial hydrologic cycle. J Clim 2008, 21:432–458.
Dai, A, Fung, IY, Del Genio, AD. Surface observed global land precipitation variations during 1900–88. J Clim 1997, 10:2943–2962.
Chen, M, Xie, P, Janowiak, JE, Arkin, PA. Global land precipitation: a 50‐yr monthly analysis based on gauge observations. J Hydrometeorol 2002, 3:249–266.
Huffman, GJ, Adler, RF, Bolvin, DT, Gu, GJ. Improving the global precipitation record: GPCP Version 2.1. Geophys Res Lett 2009, 36:L17808. doi:17810.11029/12009GL040000.
Dai, A, Qian, T, Trenberth, KE, Milliman, JD. Changes in continental freshwater discharge from 1948 to 2004. J Clim 2009, 22:2773–2792.
Brohan, P, Kennedy, JJ, Harris, I, Tett, SFB, Jones, PD. Uncertainty estimates in regional and global observed temperature changes: a new dataset from 1850. J Geophys Res 2006, 111:D12106. doi:10.1029/2005JD006548.
Rayner, NA, Brohan, P, Parker, DE, Folland, CK, Kennedy, JJ, Vanicek, M, Ansell, T, Tett, SFB. Improved analyses of changes and uncertainties in marine temperature measured in situ since the mid‐nineteenth century: the HadSST2 dataset. J Clim 2006, 19:446–469.
Donohue, RJ, McVicar, TR, Roderick, ML. Climate‐related trends in Australian vegetation cover as inferred from satellite observations, 1981–2006. Glob Change Biol 2009, 15:1025–1039.
Dai, A, Karl, TR, Sun, B, Trenberth, KE. Recent trends in cloudiness over the United States: A tale of monitoring inadequacies. Bull Am Met Soc 2006, 87:597–606.
Roderick, ML, Rotstayn, LD, Farquhar, GD, Hobbins, MT. On the attribution of changing pan evaporation. Geophys Res Lett 2007, 34:L17403. doi:17410.11029/12007GL031166.
Dai, A. Characteristics and trends in various forms of the Palmer Drought Severity Index (PDSI) during 1900–2008. J Geophys Res. To be submitted.
Dai, A, Wigley, TML. Global patterns of ENSO‐induced precipitation. Geophys Res Lett 2000, 27:1283–1286.
Adam, JC, Lettenmaier, DP. Application of new precipitation and reconstructed streamflow products to streamflow trend attribution in northern Eurasia. J Clim 2008, 21:1807–1828.
Levitus, S, Antonov, JL, Boyer, TP, Stephens, C. Warming of the world ocean. Science 2000, 287:2225–2229.
Rotstayn, LD, Lohmann, U. Tropical rainfall trends and the indirect aerosol effect. J Clim 2002, 15:2103–2116.
Menon, S, Hansen, J, Nazarenko, L, Luo, YF. Climate effects of black carbon aerosols in China and India. Science 2002, 297:2250–2253.
Shi, G, Cai, WJ, Cowan, T, Ribbe, J, Rotstayn, L, Dix, M. Variability and trend of North West Australia rainfall: observations and coupled climate modeling. J Clim 2008, 21:2938–2959.
Trenberth, KE, Hoar, TJ. El Niño and climate change. Geophys Res Lett 1997, 24:3057–3060.
Dai, A, Wigley, TML, Boville, BA, Kiehl, JK, Buja, LE. Climates of the 20th and 21st centuries simulated by the NCAR Climate System Model. J Clim 2001, 14:485–519.
Meehl, GA, Stocker, TF, Collins, WD, Friedlingstein, P, Gaye, AT, et al. Global climate projections. In: Solomon, S, Qin, D, et al., eds. Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the IPCC. Cambridge, UK/New York, USA: Cambridge University Press; 2007, 746–845.
Collins, M, An, SI, Cai, WJ, Ganachaud, A, Guilyardi, E, et al. The impact of global warming on the tropical Pacific Ocean and El Niño. Nat Geosci 2010, 3:391–397.
Lin, JL, Kiladis, GN, Mapes, BE, Weickmann, KM, Sperber, KR, et al. Tropical intraseasonal variability in 14 IPCC AR4 climate models. Part I: convective signals. J Clim 2006, 19:2665–2690.
Lin, JL. The double‐ITCZ problem in IPCC AR4 coupled GCMs: ocean‐atmosphere feedback analysis. J Clim 2007, 20:4497–4525.
Trenberth, KE, Overpeck, JT, Solomon, S. Exploring drought and its implications for the future. Eos 2004, 85:27.
Rind, D, Goldberg, R, Hansen, J, Rosenzweig, C, Ruedy, R. Potential evapotranspiration and the likelihood of future drought. J Geophys Res 1990, 95:9983–10004.
Jones, PD, Hulme, M, Briffa, KR, Jones, CG, Mitchell, JFB, Murphy, JM. Summer moisture availability over Europe in the Hadley Centre general circulation model based on the Palmer Drought Severity Index. Int J Climatol 1996, 16:155–172.
Lu, J, Vecchi, GA, Reichler, T. Expansion of the Hadley cell under global warming. Geophys Res Lett 2007, 34:L06805. doi:06810.01029/02006GL028443.
Neelin, JD, Chou, C, Su, H. Tropical drought regions in global warming and El Nino teleconnections. Geophys Res Lett 2003, 30:2275. doi:2210.1029/ 2003GL018625.
Neelin, JD, Munnich, M, Su, H, Meyerson, JE, Holloway, CE. Tropical drying trends in global warming models and observations. P Natl Acad Sci 2006, 103:6110–6115.
Trenberth, KE, Dai, A, Rasmussen, RM, Parsons, DB. The changing character of precipitation. Bull Am Met Soc 2003, 84:1205–1217.
Sun, Y, Solomon, S, Dai, A, Portmann, R. How often will it rain? J Clim 2007, 20:4801–4818.
Wang, GL. Agricultural drought in a future climate: results from 15 global climate models participating in the IPCC 4th assessment. Clim Dyn 2005, 25:739–753.
Sheffield, J, Wood, EF. Projected changes in drought occurrence under future global warming from multi‐model, multi‐scenario, IPCC AR4 simulations. Clim Dyn 2008, 31:79–105.
Meehl, GA, Covey, C, Delworth, T, Latif, M, McAvaney, B, et al. The WCRP CMIP3 multimodel dataset—a new era in climate change research. Bull Am Met Soc 2007, 88:1383–1394.
Seager, R, Ting, MF, Held, I, Kushnir, Y, Lu, J, et al. Model projections of an imminent transition to a more arid climate in southwestern North America. Science 2007, 316:1181–1184.
Feyen, L, Dankers, R. Impact of global warming on streamflow drought in Europe. J Geophys Res 2009, 114:D17116. doi:17110.11029/12008JD011438.
Mpelasoka, F, Hennessy, K, Jones, R, Bates, B. Comparison of suitable drought indices for climate change impacts assessment over Australia towards resource management. Int J Climatol 2008, 28:1283–1292.
American Meteorological Society (AMS). Geoengineering the Climate System: A Policy Statement of the American Meteorological Society; 2009. Available at: http://www.ametsoc.org/POLICY/2009geoengineeringclimate_amsstatement.html.
Trenberth, KE, Dai, A. Effects of Mount Pinatubo volcanic eruption on the hydrological cycle as an analog of geoengineering. Geophys Res Lett 2007, 34:L15702. doi:10.1029/2007GL030524.
Robock, A, Marquardt, A, Kravitz, B, Stenchikov, G. Benefits, risks, and costs of stratospheric geoengineering. Geophys Res Lett 2009, 36:L19703. doi: 19710.11029/12009GL039209.
Schubert, SD, Koster, RD, Hoerling, M, Seager, R, Lettenmaier, D, Kumar, A, Gutzler, D. Predicting drought on seasonal‐to‐decadal time scales. Bull Am Met Soc 2007, 88:1625–1630.
Dai, A. Precipitation characteristics in eighteen coupled climate models. J Clim 2006, 19:4605–4630.
Mortimore, M. Adapting to drought in the Sahel: lessons for climate change. WIREs Clim Change 2010, 1:134–143.

Resources

Media Coverage:

Press release from UCAR

USA Today: Study: Climate change to cause extreme world drought

CBS News: Drought, high temperatures forecasted for coming decades

The Guardian: Climate change threatens emerging superpowers, warns report

MSNBC: Future droughts will be shockers, study says

ABC News: Earth could see exreme drought in 30 years

Sydney Morning Herald: Much of planet could see extreme drought in 30 years: study

Cosmos: Extreme drought across most of Earth by 2060

Daily Kos: Hell is coming: Drought in the age of global warming

Author Notes

An error resulted from a discontinuity in the CMIP3 model data, which led to enlarged PDSI changes in Fig. 11. However, it does not change the drying patterns and the basic conclusions, although the quantitative references to Fig. 11 in the text of the paper may need to be adjusted accordingly. This error does not affect other results of the paper.

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