气候变化领域集成服务门户(CCPortal): The amazon water cycle: perspectives from water budget closure and ocean salinity

CCPortal

DOI	10.1175/JCLI-D-20-0309.1
	The amazon water cycle: perspectives from water budget closure and ocean salinity
	Eyre J.E.J.R.; Zeng X.
发表日期	2021
ISSN	08948755
起始页码	1439
结束页码	1451
卷号	34 期号:4
英文摘要	Global and regional water cycle includes precipitation, water vapor divergence, and change of column water vapor in the atmosphere, and land surface evapotranspiration, terrestrial water storage change, and river discharge, which is linked to ocean salinity near the river mouth. The water cycle is a crucial component of the Earth system, and numerous studies have addressed its individual components (e.g., precipitation). Here we assess, for the first time, if remote sensing and reanalysis datasets can accurately and self-consistently portray the Amazon water cycle. This is further assisted with satellite ocean salinity measurements near the mouth of the Amazon River. The widely used practice of taking the mean of an ensemble of datasets to represent water cycle components (e.g., precipitation) can produce large biases in water cycle closure. Closure is achieved with only a small subset of data combinations (e.g., ERA5 precipitation and evapotranspiration plus GRACE satellite terrestrial water storage), which rules out the lower precipitation and higher evapotranspiration estimates, providing valuable constraints on assessments of precipitation, evapotranspiration, and their ratio. The common approach of using the Óbidos stream gauge (located hundreds of kilometers from the river mouth) multiplied by a constant (1.25) to represent the entire Amazon discharge is found to misrepresent the seasonal cycle, and this can affect the apparent influence of Amazon discharge on tropical Atlantic salinity. Ó 2021 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy
英文关键词	Amazon region; Freshwater; Precipitation; Runoff; Water budget/balance
语种	英语
scopus关键词	Budget control; Digital storage; Evapotranspiration; Geodetic satellites; Large dataset; Remote sensing; Salinity measurement; Small satellites; Water conservation; Water supply; Water vapor; American meteorological societies; Copyright informations; Data combination; Grace satellites; Individual components; River discharge; Terrestrial water storage; Tropical atlantic; Rivers; data set; freshwater; hydrological cycle; precipitation (climatology); remote sensing; runoff; satellite imagery; water budget; Amazon River; Amazonia
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/178641
作者单位	Department of Hydrology and Atmospheric Sciences, University of Arizona, Tucson, AZ, United States
推荐引用方式 GB/T 7714	Eyre J.E.J.R.,Zeng X.. The amazon water cycle: perspectives from water budget closure and ocean salinity[J],2021,34(4).
APA	Eyre J.E.J.R.,&Zeng X..(2021).The amazon water cycle: perspectives from water budget closure and ocean salinity.Journal of Climate,34(4).
MLA	Eyre J.E.J.R.,et al."The amazon water cycle: perspectives from water budget closure and ocean salinity".Journal of Climate 34.4(2021).