Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018GL078254 |
Patterns of Evaporation and Precipitation Drive Global Isotopic Changes in Atmospheric Moisture | |
Bailey, Adriana1,2; Posmentier, Eric1; Feng, Xiahong1 | |
2018-07-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:14页码:7093-7101 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Because water isotope ratios respond to phase changes during evaporation (E) and precipitation (P), they are candidate fingerprints of changing atmospheric hydrology. Moreover, through preservation in ice cores and other paleoproxies, they provide important insight into the past. Still, there is disagreement over what specific attributes of hydroclimate variability isotopes reveal. Here we argue that variations in zonal mean isotope ratios of water vapor and precipitation are largely a response to geographically shifting patterns of E and P. Differences in the relative importance of local versus remote changes in these moisture variables explain the apparent distinct isotopic sensitivities to temperature and precipitation amount in high and low latitudes, respectively. Not only does our work provide a unified framework for interpreting water isotopic measurements globally, but it also presents a novel approach for diagnosing water cycle changes in a warmer world. Plain Language Summary Observations that track changes in the water cycle are critical for improving our understanding of the climate system. Particularly important are measurements that can verify whether imbalances in evaporation and precipitation increase in response to global warming. Because the isotope ratios of hydrogen and oxygen in water vapor and precipitation vary with rates of evaporation and precipitation, they are candidate fingerprints of water cycle changes. Here we use a simple mass balance model to evaluate the isotopic response of water vapor in the atmosphere to spatial variations in evaporation and precipitation. We find that these spatial patterns shape the isotope ratios by changing two critical factors: the efficiency with which precipitation dries the atmosphere and the probability that moisture is transported downwind (rather than rained out). These two factors suggest that isotope ratios are influenced both by local and by remote changes in evaporation and precipitation. Low-latitude isotope ratios respond largely to local imbalances in evaporation and precipitation, while high-latitude isotope ratios depend more on what happens "upstream." These findings provide key guidance for interpreting climate changes of the past and offer a novel approach for diagnosing water cycle changes in a warmer future. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000442582100038 |
WOS关键词 | STABLE WATER ISOTOPES ; HYDROLOGICAL CYCLE ; TIME-VARIATION ; DELTA-D ; CLIMATE ; VAPOR ; ISOTOPOLOGUES ; CIRCULATION ; MONSOON ; SPACE |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/27631 |
专题 | 气候变化 |
作者单位 | 1.Dartmouth Coll, Dept Earth Sci, Hanover, NH 03755 USA; 2.Natl Ctr Atmospher Res, POB 3000, Boulder, CO 80307 USA |
推荐引用方式 GB/T 7714 | Bailey, Adriana,Posmentier, Eric,Feng, Xiahong. Patterns of Evaporation and Precipitation Drive Global Isotopic Changes in Atmospheric Moisture[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(14):7093-7101. |
APA | Bailey, Adriana,Posmentier, Eric,&Feng, Xiahong.(2018).Patterns of Evaporation and Precipitation Drive Global Isotopic Changes in Atmospheric Moisture.GEOPHYSICAL RESEARCH LETTERS,45(14),7093-7101. |
MLA | Bailey, Adriana,et al."Patterns of Evaporation and Precipitation Drive Global Isotopic Changes in Atmospheric Moisture".GEOPHYSICAL RESEARCH LETTERS 45.14(2018):7093-7101. |
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