The annual cycle of terrestrial water storage anomalies in CMIP6 models evaluated against GRACE data

Author:

Wu Ren-Jie1,Lo Min-Hui1,Scanlon Bridget R.2

Affiliation:

1. 1 Department of Atmospheric Sciences, National Taiwan University, Taiwan

2. 2 Bureau of Economic Geology, Jackson School of Geosciences, The University of Texas at Austin, TX, USA

Abstract

AbstractTerrestrial water storage anomaly (TWSA) is a critical component of the global water cycle where improved spatiotemporal dynamics would enhance exploration of weather and climate-linked processes. Thus, correctly simulating TWSA is essential not only for water-resource management but also for assessing feedbacks to climate through land-atmosphere interactions. Here we evaluate simulated TWSA from 25 climate models (from the Climate Model Intercomparison Project 6) through comparison with TWSA from GRACE satellite data (2003 – 2014) in 14 river basins globally and assess causes of discrepancies by examining precipitation (P), evapotranspiration (ET), and runoff (Roff) fluxes during recharge (increasing TWS) and discharge (decreasing TWS) cycles. Most models show consistent biases in seasonal amplitudes of TWS anomalies relative to GRACE output: higher modeled amplitudes in river basins in high northern latitudes, Parana, and Congo, and lower amplitudes in most mid-latitude basins and other tropical basins. This TWSA systematic bias also exists in the previous CMIP5 simulations. Models overestimate P compared to observed P datasets in 7 out of 14 basins, which increases (decreases) seasonal storage amplitude relative to GRACE in the recharge (discharge) cycle. Overestimation (underestimation) of runoff is another common contributing factor in the discharge phase that increases (decreases) TWSA amplitudes relative to GRACE in 5 river basins. The results provide a comprehensive assessment of the reliability of the simulated annual range in TWSA through comparison with GRACE data that can be used to guide future model development.

Publisher

American Meteorological Society

Subject

Atmospheric Science

Reference96 articles.

1. Assessing surface water consumption using remotely-sensed groundwater, evapotranspiration, and precipitation;Anderson;Geophys. Res. Lett.,2012

2. Seasonal water storage variations as impacted by water abstractions: Comparing the output of a global hydrological model with GRACE and GPS observations;Döll;Surv. Geophys.,2014

3. Global terrestrial water storage capacity and flood potential using GRACE;Reager;Geophys. Res. Lett.,2009

4. Precipitation response to land subsurface hydrologic processes in atmospheric general circulation model simulations;Lo;J. Geophys. Res.,2011

5. Using qflux to constrain modeled Congo Basin rainfall in the CMIP5 ensemble;Creese;J. Geophys. Res.,2016

Cited by 18 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3