We see a distinctive pattern of the wetland areas of the world getting wetter – those are the high latitudes and the tropics – and the dry areas in between getting dryer. Figure 2 presents maps of the IPCC, GPCP and irrigated-area data. The glaciers of the Tien Shan mountain range, whose central third lies within region 11, are melting rapidly 49 , but not rapidly enough to explain all of the mass loss.
With ten years of additional hindsight, it appears that the region may have simply endured a prolonged drought from the late 1970s to the early 2000s. We can only justifiably conclude that natural variability is the primary explanation for both Australian trends. We tested these two theories as well as a third, agricultural water consumption. Data availability Specific sources of data used in this study were the following.
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Gelaro, R. et al. Graphics were produced by A. Annual precipitation totals—Eurasia. a – n , As in Extended Data Fig. 5 , for regions 7–18 and the full drainage basins of the Aral and Caspian seas. And there are other human-induced changes, relating not to climate change but, rather, to direct withdrawals of water from the landscape. This will alert our moderators to take action Name Reason for reporting: Foul language Slanderous Inciting hatred against a certain community Others Your Reason has been Reported to the admin.
Annotated map of TWS trends. Groundwater is being withdrawn to support irrigated agriculture across the province 50 , 51 and possibly to dewater coal mines 52 . Nevertheless, here we estimate the rate to be −7.0 ± 6.4 Gt yr −1 . Thus, we attribute the GRACE-period trend to natural variability 82 . These changes portend a future in which already limited water resources will become even more precious.
The primary GRACE TWS dataset is JPL Mascon RL05M.1 version 2, accessed on 3 February 2017 from https://grace.jpl.nasa.gov/data/get-data/jpl_global_mascons/ . C. & van den Broeke, M. Syed, T. S. Detectability of variations in continental water storage from satellite observations of the time dependent gravity field. Earth Obs. Google Scholar 31. Google Scholar 38. S. Gravity Recovery and Climate Experiment (GRACE) detection of water storage changes in the Three Gorges Reservoir of China and comparison with in situ measurements.