Citation: | Lin Zhang, Yanfeng Liu, Menggui Jin, Xing Liang. Spatiotemporal Variability in Extreme Temperature Events in an Arid-Semiarid Region of China and Their Teleconnections with Large-Scale Atmospheric Circulation. Journal of Earth Science, 2023, 34(4): 1201-1217. doi: 10.1007/s12583-021-1517-9 |
With a warming climate, temperature extremes have been a main global issue in recent decades due to their potential influence on the sustainable development of human life and natural ecosystems. In this study, 12 indicators of extreme temperature events are used to evaluate the spatiotemporal distribution, periodic structure and teleconnections with large-scale atmospheric circulation in Xinjiang, Northwest China by combining wavelet coherence (WTC) analysis based on continuous wavelet transform (CWT) analysis with the sequential Mann-Kendall test. We find that over the past six decades, the climate in Xinjiang has become warmer and has suffered from increases in the frequency of warm extremes and decreases in the frequency of cold extremes. Warm extremes have mainly occurred in the southern Tianshan Mountains surrounding the Tarim Basin and western part of the Taklamakan Desert, and cold extremes have primarily occurred in the southwestern Altai Mountains and northern foot of the Tianshan Mountains. Extreme temperature events, including warm extremes, cold extremes, and other temperature indices, have significant interannual variability, with the main oscillation periods at smaller (2–4-year band), intermediate (4–7-year band), and greater time scales in recent decades. Furthermore, cold-extreme indices, including frost days, cool days, and cool nights all show a clear changepoint during 1990–1997 at the 95% confidence level, and both ice days and cold spell duration indicator have a potential changepoint during 1981–1986. However, the changing points for warm-extreme indices are detected during 1992–1998. The temperature variables are significantly correlated with the EI Niño-Southern Oscillation (ENSO) and Arctic Oscillation (AO), but less well correlated with the Pacific Decadal Oscillation (PDO). The phase difference in the WTC spectra is not uniform between temperature extremes and climatic oscillations. Our findings will have important implications for local governments in taking effective measures to mitigate the potential effects of regional climate warming due to human activities in Xinjiang.
Aguilar, E., Aziz Barry, A., Brunet, M., et al., 2009. Changes in Temperature and Precipitation Extremes in Western Central Africa, Guinea Conakry, and Zimbabwe, 1955–2006. Journal of Geophysical Research: Atmospheres, 114(D2): D02115. https://doi.org/10.1029/2008JD011010 |
Allen, M. R., Ingram, W. J., 2002. Constraints on Future Changes in Climate and the Hydrologic Cycle. Nature, 419(6903): 224–232. https://doi.org/10.1038/nature01092 |
Barnes, E. A., Polvani, L., 2013. Response of the Midlatitude Jets, and of Their Variability, to Increased Greenhouse Gases in the CMIP5 Models. Journal of Climate, 26(18): 7117–7135. https://doi.org/10.1175/JCLI-D-12-00536.1 |
Cavalcanti, I. F. A., 2012. Large Scale and Synoptic Features Associated with Extreme Precipitation over South America: A Review and Case Studies for the First Decade of the 21st Century. Atmospheric Research, 118: 27–40. https://doi.org/10.1016/j.atmosres.2012.06.012 |
Chen, Y. N., Li, Z., Fan, Y. T., et al., 2014. Research Progress on the Impact of Climate Change on Water Resources in the Arid Region of Northwest China. Acta Geographica Sinica, 69(9): 1295–1304 (in Chinese with English Abstract) |
Chen, Y. N., Li, Z., Fan, Y. T., et al., 2015. Progress and Prospects of Climate Change Impacts on Hydrology in the Arid Region of Northwest China. Environmental Research, 139: 11–19. https://doi.org/10.1016/j.envres.2014.12.029 |
Chen, Y. N., Li, Z., Li, W. H., et al., 2016. Water and Ecological Security: Dealing with Hydroclimatic Challenges at the Heart of China's Silk Road. Environmental Earth Sciences, 75(10): 881. https://doi.org/10.1007/s12665-016-5385-z |
Chen, Y. N., Takeuchi, K., Xu, C. C., et al., 2006. Regional Climate Change and Its Effects on River Runoff in the Tarim Basin, China. Hydrological Processes, 20(10): 2207–2216. https://doi.org/10.1002/hyp.6200 |
Chen, Y. N., Zhang, X. Q., Fang, G. H., et al., 2020. Potential Risks and Challenges of Climate Change in the Arid Region of Northwestern China. Regional Sustainability, 1(1): 20–30. https://doi.org/10.1016/j.regsus.2020.06.003 |
Das, J., Jha, S., Goyal, M. K., 2020. On the Relationship of Climatic and Monsoon Teleconnections with Monthly Precipitation over Meteorologically Homogenous Regions in India: Wavelet & Global Coherence Approaches. Atmospheric Research, 238(C): 104889. https://doi.org/10.1016/j.atmosres.2020.104889 |
de F. Forster, P. M., Solomon, S., 2003. Observations of a "Weekend Effect" in Diurnal Temperature Range. Proceedings of the National Academy of Sciences of the United States of America, 100(20): 11225–11230. https://doi.org/10.1073/pnas.2034034100 |
Deng, H. J., Chen, Y. N., Wang, H. J., et al., 2015. Climate Change with Elevation and Its Potential Impact on Water Resources in the Tianshan Mountains, Central Asia. Global and Planetary Change, 135: 28–37. https://doi.org/10.1016/j.gloplacha.2015.09.015 |
Diffenbaugh, N. S., Singh, D., Mankin, J. S., et al., 2017. Quantifying the Influence of Global Warming on Unprecedented Extreme Climate Events. Proceedings of the National Academy of Sciences of the United States of America, 114(19): 4881–4886. https://doi.org/10.1073/pnas.1618082114 |
Easterling, D. R., Horton, B., Jones, P. D., et al., 1997. Maximum and Minimum Temperature Trends for the Globe. Science, 277(5324): 364–367. https://doi.org/10.1126/science.277.5324.364 |
Easterling, D. R., Meehl, G. A., Parmesan, C., et al., 2000. Climate Extremes: Observations, Modeling, and Impacts. Science, 289(5487): 2068–2074. https://doi.org/10.1126/science.289.5487.2068 |
Firouzi, S., Wang, X. N., 2019. A Comparative Study of Exchange Rates and Order Flow Based on Wavelet Transform Coherence and Cross Wavelet Transform. Economic Modelling, 82: 42–56. https://doi.org/10.1016/j.econmod.2019.09.006 |
Fu, C. S., James, A. L., Wachowiak, M. P., 2012. Analyzing the Combined Influence of Solar Activity and El Niño on Streamflow across Southern Canada. Water Resources Research, 48(5): W05507. https://doi.org/10.1029/2011WR011507 |
Furtado, J. C., Di Lorenzo, E., Schneider, N., et al., 2011. North Pacific Decadal Variability and Climate Change in the IPCC AR4 Models. Journal of Climate, 24(12): 3049–3067. https://doi.org/10.1175/2010jcli3584.1 |
Grinsted, A., Moore, J. C., Jevrejeva, S., 2004. Application of the Cross Wavelet Transform and Wavelet Coherence to Geophysical Time Series. Nonlinear Processes in Geophysics, 11(5/6): 561–566. https://doi.org/10.5194/npg-11-561-2004 |
Guo, E. L., Zhang, J. Q., Wang, Y. F., et al., 2019. Spatiotemporal Variations of Extreme Climate Events in Northeast China during 1960–2014. Ecological Indicators, 96: 669–683. https://doi.org/10.1016/j.ecolind.2018.09.034 |
Hao, Y. H., Zhang, J., Wang, J. J., et al., 2016. How does the Anthropogenic Activity Affect the Spring Discharge? Journal of Hydrology, 540: 1053–1065. https://doi.org/10.1016/j.jhydrol.2016.07.024 |
He, Y. Q., Pu, T., Li, Z. X., et al., 2010. Climate Change and Its Effect on Annual Runoff in Lijiang Basin-Mt. Yulong Region, China. Journal of Earth Science, 21(2): 137–147. https://doi.org/10.1007/s12583-010-0012-5 |
Henderson, R. D., Day-Lewis, F. D., Harvey, C. F., 2009. Investigation of Aquifer-Estuary Interaction Using Wavelet Analysis of Fiber-Optic Temperature Data. Geophysical Research Letters, 36(6): L06403. https://doi.org/10.1029/2008GL036926 |
Holman, I. P., Rivas-Casado, M., Bloomfield, J. P., et al., 2011. Identifying Non-Stationary Groundwater Level Response to North Atlantic Ocean-Atmosphere Teleconnection Patterns Using Wavelet Coherence. Hydrogeology Journal, 19(6): 1269–1278. https://doi.org/10.1007/s10040-011-0755-9 |
Hu, Z. Y., Zhang, C., Hu, Q., et al., 2014. Temperature Changes in Central Asia from 1979 to 2011 Based on Multiple Datasets. Journal of Climate, 27(3): 1143–1167. https://doi.org/10.1175/jcli-d-13-00064.1 |
Huang, S. Z., Li, P., Huang, Q., et al., 2017. The Propagation from Meteorological to Hydrological Drought and Its Potential Influence Factors. Journal of Hydrology, 547: 184–195. https://doi.org/10.1016/j.jhydrol.2017.01.041 |
Huo, X. L., Lei, L. Y., Liu, Z. F., et al., 2016. Application of Wavelet Coherence Method to Investigate Karst Spring Discharge Response to Climate Teleconnection Patterns. Journal of the American Water Resources Association, 52(6): 1281–1296. https://doi.org/10.1111/1752-1688.12452 |
IPCC, 2014. Technical Summary of Climate Change 2014: Impacts, Adaptation, and Vulnerability. Part A: Global and Sectoral Aspects. Contribution of Working Group Ⅱ to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge University Press, Cambridge |
Jevrejeva, S., Moore, J. C., Grinsted, A., 2003. Influence of the Arctic Oscillation and El Niño-Southern Oscillation (ENSO) on Ice Conditions in the Baltic Sea: The Wavelet Approach. Journal of Geophysical Research: Atmospheres, 108(D21): 4677. https://doi.org/10.1029/2003JD003417 |
Karl, T. R., Nicholls, N., Ghazi, A., 1999. CLIVAR/GCOS/WMO Workshop on Indices and Indicators for Climate Extremes Workshop Summary. Weather and Climate Extremes. Springer, Dordrecht. 42: 3–7. https://doi.org/10.1007/978-94-015-9265-9_2 |
Keener, V. W., Feyereisen, G. W., Lall, U., et al., 2010. El-Niño/Southern Oscillation (ENSO) Influences on Monthly NO3 Load and Concentration, Stream Flow and Precipitation in the Little River Watershed, Tifton, Georgia (GA). Journal of Hydrology, 381(3/4): 352–363. https://doi.org/10.1016/j.jhydrol.2009.12.008 |
Kendall, M. G., 1975. Rank Correlation Methods, 4th Edition. Charles Griffin, London |
Kishtawal, C. M., Niyogi, D., Tewari, M., et al., 2010. Urbanization Signature in the Observed Heavy Rainfall Climatology over India. International Journal of Climatology, 30(13): 1908–1916. https://doi.org/10.1002/joc.2044 |
Kundzewicz, Z. W., 2005. Flood Risk in the Changing World-Yangtze Floods. In: Climate Change and Yangtze Floods. Science Press, Beijing. 246–258 |
Labat, D., 2010. Cross Wavelet Analyses of Annual Continental Freshwater Discharge and Selected Climate Indices. Journal of Hydrology, 385(1/2/3/4): 269–278. https://doi.org/10.1016/j.jhydrol.2010.02.029 |
Lewis, S. C., King, A. D., Perkins-Kirkpatrick, S. E., et al., 2019. Regional Hotspots of Temperature Extremes under 1.5 ℃ and 2 ℃ of Global Mean Warming. Weather and Climate Extremes, 26: 100233. https://doi.org/10.1016/j.wace.2019.100233 |
Li, J. R., Niu, Z. G., Feng, L., et al., 2020. Simulation and Prediction of Extreme Temperature Indices in Yangtze and Yellow River Basins by CMIP5 Models. Earth Science, 45(6): 1887–1904 (in Chinese with English Abstract) |
Li, Q. F., He, P. F., He, Y. C., et al., 2020. Investigation to the Relation between Meteorological Drought and Hydrological Drought in the Upper Shaying River Basin Using Wavelet Analysis. Atmospheric Research, 234: 104743. https://doi.org/10.1016/j.atmosres.2019.104743 |
Li, Z. H., Shi, X. G., Tang, Q. H., et al., 2020. Partitioning the Contributions of Glacier Melt and Precipitation to the 1971–2010 Runoff Increases in a Headwater Basin of the Tarim River. Journal of Hydrology, 583: 124579. https://doi.org/10.1016/j.jhydrol.2020.124579 |
Ling, H. B., Zhang, Q. Q., Shi, W., et al., 2011. Runoff Variation Law and Its Response to Climate Change in the Headstream Area of the Keriya River Basin, Xinjiang. Journal of Earth Science, 22(6): 780–791. https://doi.org/10.1007/s12583-011-0227-0 |
Long, B., Zhang, B. Q., He, C. S., et al., 2018. Is there a Change from a Warm-Dry to a Warm-Wet Climate in the Inland River Area of China? Interpretation and Analysis through Surface Water Balance. Journal of Geophysical Research: Atmospheres, 123(14): 7114–7131. https://doi.org/10.1029/2018JD028436 |
Mahony, C. R., Cannon, A. J., 2018. Wetter Summers can Intensify Departures from Natural Variability in a Warming Climate. Nature Communications, 9(1): 1–9. https://doi.org/10.1038/s41467-018-03132-z |
Malhi, Y., Franklin, J., Seddon, N., et al., 2020. Climate Change and Ecosystems: Threats, Opportunities and Solutions. Philosophical Transactions of the Royal Society of London Series B, Biological Sciences, 375(1794): 20190104. https://doi.org/10.1098/rstb.2019.0104 |
Mann, H. B., 1945. Nonparametric Tests Against Trend. Econometrica, 13(3): 245–259. https://doi.org/10.2307/1907187 |
Mantua, N. J., Hare, S. R., Zhang, Y., et al., 1997. A Pacific Interdecadal Climate Oscillation with Impacts on Salmon Production. Bulletin of the American Meteorological Society, 78(6): 1069–1079. https://doi.org/10.1175/1520-0477(1997)0781069:apicow>2.0.co;2 doi: 10.1175/1520-0477(1997)0781069:apicow>2.0.co;2 |
Meehl, G. A., Hu, A. X., Santer, B. D., et al., 2016. Contribution of the Interdecadal Pacific Oscillation to Twentieth-Century Global Surface Temperature Trends. Nature Climate Change, 6(11): 1005–1008. https://doi.org/10.1038/nclimate3107 |
Mutiibwa, D., Vavrus, S. J., McAfee, S. A., et al., 2015. Recent Spatiotemporal Patterns in Temperature Extremes across Conterminous United States. Journal of Geophysical Research: Atmospheres, 120(15): 7378–7392. https://doi.org/10.1002/2015JD023598 |
Nalley, D., Adamowski, J., Khalil, B., et al., 2016. Inter-Annual to Inter-Decadal Streamflow Variability in Quebec and Ontario in Relation to Dominant Large-Scale Climate Indices. Journal of Hydrology, 536: 426–446. https://doi.org/10.1016/j.jhydrol.2016.02.049 |
Nourani, V., Ghasemzade, M., Mehr, A. D., et al., 2019. Investigating the Effect of Hydroclimatological Variables on Urmia Lake Water Level Using Wavelet Coherence Measure. Journal of Water and Climate Change, 10(1): 13–29. https://doi.org/10.2166/wcc.2018.261 |
Polyakov, I. V., Proshutinsky, A. Y., Johnson, M. A., 1999. Seasonal Cycles in Two Regimes of Arctic Climate. Journal of Geophysical Research: Oceans, 104(C11): 25761–25788. https://doi.org/10.1029/1999JC900208 |
Pour, S. H., Wahab, A. K. A., Shahid, S., et al., 2020. Changes in Reference Evapotranspiration and Its Driving Factors in Peninsular Malaysia. Atmospheric Research, 246: 105096. https://doi.org/10.1016/j.atmosres.2020.105096 |
R Core Team, 2019. R: A Language and Environment for Statistical Computing, R Foundation for Statistical Computing, Vienna. |
Rashid, M. M., Beecham, S., Chowdhury, R. K., 2015. Assessment of Trends in Point Rainfall Using Continuous Wavelet Transforms. Advances in Water Resources, 82: 1–15. https://doi.org/10.1016/j.advwatres.2015.04.006 |
Sen, P. K., 1968. Estimates of the Regression Coefficient Based on Kendall's Tau. Journal of the American Statistical Association, 63(324): 1379–1389. https://doi.org/10.1080/01621459.1968.10480934 |
Seneviratne, S. I., Nicholls, N., Easterling, D., et al., 2012. Changes in Climate Extremes and Their Impacts on the Natural Physical Environment. In: Managing the Risks of Extreme Events and Disasters to Advance Climate Change Adaptation. A Special Report of Working Groups I and II of the Intergovernmental Panel on Climate Change (IPCC). Cambridge University Press, Cambridge. 109–230 |
Shepherd, T. G., 2014. Atmospheric Circulation as a Source of Uncertainty in Climate Change Projections. Nature Geoscience, 7(10): 703–708. https://doi.org/10.1038/ngeo2253 |
Sillmann, J., Kharin, V. V., Zhang, X., et al., 2013. Climate Extremes Indices in the CMIP5 Multimodel Ensemble: Part 1. Model Evaluation in the Present Climate. Journal of Geophysical Research: Atmospheres, 118(4): 1716–1733. https://doi.org/10.1002/jgrd.50203 |
Simpson, I. R., Seager, R., Ting, M. F., et al., 2016. Causes of Change in Northern Hemisphere Winter Meridional Winds and Regional Hydroclimate. Nature Climate Change, 6(1): 65–70. https://doi.org/10.1038/nclimate2783 |
Sneyers, R., 1991. On the Statistical Analysis of Series of Observations. World Meteorological Organization, Technical Note 143. Geneva, Switzerland |
Stone, D., Weaver, A., 2003. Factors Contributing to Diurnal Temperature Range Trends in Twentieth and Twenty-First Century Simulations of the CCCma Coupled Model. Climate Dynamics, 20(5): 435–445. https://doi.org/10.1007/s00382-002-0288-y |
Sun, Q. H., Miao, C. Y., Duan, Q. Y., et al., 2015. Temperature and Precipitation Changes over the Loess Plateau between 1961 and 2011, Based on High-Density Gauge Observations. Global and Planetary Change, 132: 1–10. https://doi.org/10.1016/j.gloplacha.2015.05.011 |
Sun, W. Y., Mu, X. M., Song, X. Y., et al., 2016. Changes in Extreme Temperature and Precipitation Events in the Loess Plateau (China) during 1960–2013 under Global Warming. Atmospheric Research, 168: 33–48. https://doi.org/10.1016/j.atmosres.2015.09.001 |
Swain, D. L., Horton, D. E., Singh, D., et al., 2016. Trends in Atmospheric Patterns Conducive to Seasonal Precipitation and Temperature Extremes in California. Science Advances, 2(4): e1501344. https://doi.org/10.1126/sciadv.1501344 |
Tao, H., Gemmer, M., Bai, Y. G., et al., 2011. Trends of Streamflow in the Tarim River Basin during the Past 50years: Human Impact or Climate Change? Journal of Hydrology, 400(1/2): 1–9. https://doi.org/10.1016/j.jhydrol.2011.01.016 |
Tegegne, G., Melesse, A. M., Worqlul, A. W., 2020. Development of Multi-Model Ensemble Approach for Enhanced Assessment of Impacts of Climate Change on Climate Extremes. Science of the Total Environment, 704: 135357. https://doi.org/10.1016/j.scitotenv.2019.135357 |
Tong, S. Q., Li, X. Q., Zhang, J. Q., et al., 2019. Spatial and Temporal Variability in Extreme Temperature and Precipitation Events in Inner Mongolia (China) during 1960–2017. Science of the Total Environment, 649: 75–89. https://doi.org/10.1016/j.scitotenv.2018.08.262 |
Torrence, C., Compo, G. P., 1998. A Practical Guide to Wavelet Analysis. Bulletin of the American Meteorological Society, 79(1): 61–78. https://doi.org/10.1175/1520-0477(1998)0790061:apgtwa>2.0.co;2 doi: 10.1175/1520-0477(1998)0790061:apgtwa>2.0.co;2 |
Torrence, C., Webster, P. J., 1999. Interdecadal Changes in the ENSO–Monsoon System. Journal of Climate, 12(8): 2679–2690. https://doi.org/10.1175/1520-0442(1999)0122679:icitem>2.0.co;2 doi: 10.1175/1520-0442(1999)0122679:icitem>2.0.co;2 |
van Wilgen, N. J., Goodall, V., Holness, S., et al., 2016. Rising Temperatures and Changing Rainfall Patterns in South Africa's National Parks. International Journal of Climatology, 36(2): 706–721. https://doi.org/10.1002/joc.4377 |
Wang, J., Liang, X., Jin, M. G., et al., 2020. Evaluation of Phreatic Evaporation in Manas River Basin Plain by Bromine Tracing Method. Earth Science, 45(3): 1051–1060 (in Chinese with English Abstract) |
Wang, Q., Zhai, P. M., Qin, D. H., 2020. New Perspectives on 'Warming–Wetting' Trend in Xinjiang, China. Advances in Climate Change Research, 11(3): 252–260. https://doi.org/10.1016/j.accre.2020.09.004 |
Wang, Y. J., Qin, D. H., 2017. Influence of Climate Change and Human Activity on Water Resources in Arid Region of Northwest China: An Overview. Advances in Climate Change Research, 8(4): 268–278. https://doi.org/10.1016/j.accre.2017.08.004 |
Wei, K., Wang, L., 2013. Reexamination of the Aridity Conditions in Arid Northwestern China for the Last Decade. Journal of Climate, 26(23): 9594–9602. https://doi.org/10.1175/jcli-d-12-00605.1 |
Xi, Y., Miao, C. Y., Wu, J. W., et al., 2018. Spatiotemporal Changes in Extreme Temperature and Precipitation Events in the Three-Rivers Headwater Region, China. Journal of Geophysical Research: Atmospheres, 123(11): 5827–5844. https://doi.org/10.1029/2017JD028226 |
Xue, M., Hang, R. L., Liu, Q. S., et al., 2021. CNN-Based Near-Real-Time Precipitation Estimation from Fengyun-2 Satellite over Xinjiang, China. Atmospheric Research, 250: 105337. https://doi.org/10.1016/j.atmosres.2020.105337 |
Yao, J. Q., Zhao, Y., Chen, Y. N., et al., 2018. Multi-Scale Assessments of Droughts: a Case Study in Xinjiang, China. Science of the Total Environment, 630: 444–452. https://doi.org/10.1016/j.scitotenv.2018.02.200 |
You, Q. L., Kang, S. C., Flügel, W. A., et al., 2009. Does a Weekend Effect in Diurnal Temperature Range Exist in the Eastern and Central Tibetan Plateau? Environmental Research Letters, 4(4): 045202. https://doi.org/10.1088/1748-9326/4/4/045202 |
Zhang, L., Liu, Y. F., Zhan, H. B., et al., 2021. Influence of Solar Activity and EI Niño-Southern Oscillation on Precipitation Extremes, Streamflow Variability and Flooding Events in an Arid-Semiarid Region of China. Journal of Hydrology, 601: 126630. https://doi.org/10.1016/j.jhydrol.2021.126630 |
Zhang, Q., Li, J. F., Singh, V. P., et al., 2012. SPI-Based Evaluation of Drought Events in Xinjiang, China. Natural Hazards, 64(1): 481–492. https://doi.org/10.1007/s11069-012-0251-0 |
Zhang, Q., Xu, C. Y., Tao, H., et al., 2010. Climate Changes and Their Impacts on Water Resources in the Arid Regions: A Case Study of the Tarim River Basin, China. Stochastic Environmental Research and Risk Assessment, 24(3): 349–358. https://doi.org/10.1007/s00477-009-0324-0 |
Zhang, T., Hoell, A., Perlwitz, J., et al., 2019. Towards Probabilistic Multivariate ENSO Monitoring. Geophysical Research Letters, 46(17/18): 10532–10540. https://doi.org/10.1029/2019GL083946 |
Zhang, Y., Wang, J. C., Jing, J. H., et al., 2014. Response of Groundwater to Climate Change under Extreme Climate Conditions in North China Plain. Journal of Earth Science, 25(3): 612–618. https://doi.org/10.1007/s12583-014-0443-5 |
Zhou, L. M., Dickinson, R. E., Tian, Y. H., et al., 2007. Impact of Vegetation Removal and Soil Aridation on Diurnal Temperature Range in a Semiarid Region: Application to the Sahel. Proceedings of the National Academy of Sciences of the United States of America, 104(46): 17937–17942. https://doi.org/10.1073/pnas.0700290104 |