DOI: 10.1175/JCLI-D-13-00331.1
Scopus记录号: 2-s2.0-84892458067
论文题名: An updated TRMM composite climatology of tropical rainfall and its validation
作者: Wang J.-J. ; Adler R.F. ; Huffman G.J. ; Bolvin D.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2014
卷: 27, 期: 1 起始页码: 273
结束页码: 284
语种: 英语
Scopus关键词: Compositing techniques
; Global precipitation climatology projects
; Mean precipitation
; Precipitation radar
; Rainfall estimates
; Standard deviation
; Tropical rainfall measuring missions
; Uncertainty estimates
; Algorithms
; Climatology
; Estimation
; Gages
; Oceanography
; Quality control
; Radar
; Rain
; Rain gages
; Uncertainty analysis
; algorithm
; open ocean
; precipitation (climatology)
; radar
; rainfall
; TRMM
; Pacific Ocean
英文摘要: An updated 15-yr Tropical Rainfall Measuring Mission (TRMM) composite climatology (TCC) is presented and evaluated. This climatology is based on a combination of individual rainfall estimates made with data from the primaryTRMMinstruments: theTRMMMicrowave Imager (TMI) and the precipitation radar (PR). This combination climatology of passive microwave retrievals, radar-based retrievals, and an algorithm using both instruments simultaneously provides a consensus TRMM-based estimate of mean precipitation. The dispersion of the three estimates, as indicated by the standard deviation s among the estimates, is presented as a measure of confidence in the final estimate and as an estimate of the uncertainty thereof. The procedures utilized by the compositing technique, including adjustments and quality-control measures, are described. The results give a mean value of the TCC of 4.3 mm day-1 for the deep tropical ocean beltbetween 10°N and 10°S, with lower values outside that band. In general, the TCC values confirm ocean estimates from the Global Precipitation Climatology Project (GPCP) analysis, which is based on passive microwave results adjusted for sampling by infrared-based estimates. The pattern of uncertainty estimates shown by s is seen to be useful to indicate variations in confidence. Examples include differences between the eastern and western portions of the Pacific Ocean and high values in coastal and mountainous areas. Comparison of the TCC values (and the input products) to gauge analyses over land indicates the value of the radar-based estimates (small biases) and the limitations of the passive microwave algorithm (relatively large biases). Comparison with surface gauge information from western Pacific Ocean atolls shows a negative bias (~16%) for all the TRMM products, although the representativeness of the atoll gauges of open-ocean rainfall is still in question. © 2014 American Meteorological Society. 资助项目: NASA, National Aeronautics and Space Administration
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51110
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Earth System Science Interdisciplinary Center, University of Maryland, College Park, College Park, MD, United States; Laboratory for Atmospheres, NASA Goddard Space Flight Center, Greenbelt, MD, United States; Science Systems and Applications Inc., Greenbelt, MD, United States
Recommended Citation:
Wang J.-J.,Adler R.F.,Huffman G.J.,et al. An updated TRMM composite climatology of tropical rainfall and its validation[J]. Journal of Climate,2014-01-01,27(1)