Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017JD027355 |
GPM Satellite Radar Measurements of Precipitation and Freezing Level in Atmospheric Rivers: Comparison With Ground-Based Radars and Reanalyses | |
Cannon, Forest1; Ralph, F. Martin1; Wilson, Anna M.1; Lettenmaier, Dennis P.2 | |
2017-12-16 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2017 |
卷号 | 122期号:23 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Atmospheric rivers (ARs) account for more than 90% of the total meridional water vapor flux in midlatitudes, and 25-50% of the annual precipitation in the coastal western United States. In this study, reflectivity profiles from the Global Precipitation Measurement Dual-Frequency Precipitation Radar (GPM-DPR) are used to evaluate precipitation and temperature characteristics of ARs over the western coast of North America and the eastern North Pacific Ocean. Evaluation of GPM-DPR bright-band height using a network of ground-based vertically pointing radars along the West Coast demonstrated exceptional agreement, and comparison with freezing level height from reanalyses over the eastern North Pacific Ocean also consistently agreed, indicating that GPM-DPR can be used to independently validate freezing level in models. However, precipitation comparison with gridded observations across the western United States indicated deficiencies in GPM-DPR's ability to reproduce the spatial distribution of winter precipitation, likely related to sampling frequency. Over the geographically homogeneous oceanic portion of the domain, sampling frequency was not problematic, and significant differences in the frequency and intensity of precipitation between GPM-DPR and reanalyses highlighted biases in both satellite-observed and modeled AR precipitation. Reanalyses precipitation rates below the minimum sensitivity of GPM-DPR accounted for a 20% increase in total precipitation, and 25% of radar-derived precipitation rates were greater than the 99th percentile precipitation rate in reanalyses. Due to differences in the proportions of precipitation in convective, stratiform bright-band, and non-bright-band conditions, AR conditions contributed nearly 10% more to total precipitation in GPM-DPR than reanalyses. |
英文关键词 | atmospheric rivers GPM satellite precipitation radar freezing level height reanalyses |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000419396500003 |
WOS关键词 | WEST-COAST ; SIERRA-NEVADA ; FREQUENCY ; CONVECTION ; ALGORITHM ; WINTER ; MODEL ; MULTIMODEL ; CALIFORNIA ; MULTIYEAR |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
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/32984 |
专题 | 气候变化 |
作者单位 | 1.Univ Calif San Diego, Scripps Inst Oceanog, Ctr Western Weather & Water Extremes, La Jolla, CA 92093 USA; 2.Univ Calif Los Angeles, Dept Geog, Los Angeles, CA 90024 USA |
推荐引用方式 GB/T 7714 | Cannon, Forest,Ralph, F. Martin,Wilson, Anna M.,et al. GPM Satellite Radar Measurements of Precipitation and Freezing Level in Atmospheric Rivers: Comparison With Ground-Based Radars and Reanalyses[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(23). |
APA | Cannon, Forest,Ralph, F. Martin,Wilson, Anna M.,&Lettenmaier, Dennis P..(2017).GPM Satellite Radar Measurements of Precipitation and Freezing Level in Atmospheric Rivers: Comparison With Ground-Based Radars and Reanalyses.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(23). |
MLA | Cannon, Forest,et al."GPM Satellite Radar Measurements of Precipitation and Freezing Level in Atmospheric Rivers: Comparison With Ground-Based Radars and Reanalyses".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.23(2017). |
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