干旱区生态环境知识资源中心(Arid): NOAA RFE 2.0在西藏高原的验证

Arid

	NOAA RFE 2.0在西藏高原的验证
其他题名	THE VALIDATION OF NOAA RFE 2.0 RAINFALL PRODUCT OVER MAJOR CLIMATE ZONES IN TIBET
	除多 1; 罗布坚参 2; 普布顿珠 2
来源期刊	热带气象学报
ISSN	1004-4965
出版年	2013
卷号	29 期号:4 页码:581-589
中文摘要	随着卫星探测技术的不断提高和资料处理方法的不断改进,出现了许多卫星遥感降水估算产品。每种产品都有优点及不足,且卫星间接式降水估算方法的精度也有限,但对地形复杂常规气象站台站稀少且分布极不均匀的大面积地区如西藏高原来说,卫星遥感不失为估算区域降水的有效方法之一。鉴于卫星遥感降水估算精度的局限性,每种产品需要利用地面观测数据来定量化降水估算误差,分析和评价这些资料的可用性。利用NOAA气候预测中心(CPC)研发的RFE 2.0降水估算产品,从西藏高原东南部到西北部不同气候区选取11个典型气象站20052006年69月的日降水量观测资料,验证了RFE 2.0降水估算产品在西藏高原的应用效果。结果表明,西藏高原的主要气候区RFE 2.0估算值与地面观测值之间的相关系数在0.45~0.86,平均为0.74;RFE 2.0估算的正确率POD(Probability Of Detection)一般大于73%,而空报率FAR(False Alarm Rate)为2%~12%;仅在喜马拉雅南麓地区估算精度相对较差。
英文摘要	The principal existing sources of precipitation measurement are gauge observations and estimates inferred from satellite data. Generally, rain gauge observations yield relatively accurate point measurements of precipitation but suffer from sampling error in representing areal means and are not available over most oceanic and unpopulated land areas. Satellite observations can be used to derive large-scale precipitation over most areas of the globe and appear to be only cost effective and viable means to achieve an estimate of regional precipitation. In recent decades, the advancement of satellite remote sensing technology and data application have enabled the generation of numerous precipitation estimate products. As one of satellite rainfall estimate products, the Rainfall Estimation (RFE) was developed and maintained by NOAA Climate Prediction Center (CPC) in 1998 and the African RFE 2.0 was moved to operational status at the NOAA/CPC in 2001. This product has been implemented to the southern Asian region, including the Hindu Kush Himalayan region and Tibetan Plateau, in May of 2001, through a long-term project "Regional Cooperation in Flood Forecasting and Information Exchange in the HKH Region" coordinated by ICIMOD (International Centre for Integrated Mountain Development) in collaboration with regional partner countries since 2001. In this paper, the validation of NOAA CPC-RFE 2.0 rainfall estimates was made using observed daily rainfall during the rainy season from June to September of 2005 and 2006 in 11 typical meteorological stations selected based on the different climate zones from subtropical moisture zone in the southeast to alpine arid zone in the northwest in Tibet. The results show that the mean correlation coefficient between satellite estimated and observed rainfall is 0.74, coefficients in most part of Tibet are above 0.67 and only in two stations (Pali and Nielamu) located in the southern brink of Tibet along the Himalayan mountains is less than 0.62. In addition, a continuous validation approach shows that the RFE performed well in different climate zones relative to having the high correlation, with considerably low mean error (<1 mm) and root mean square error (<5 mm) scores except for Nielamu station. For the dichotomous validation, in most stations in Tibet, the probability of detection (POD) values is above 73% while the false alarm rate (FAR) is 2%-12%. The accuracy of satellite estimated rainfall is associated with rainfall amount and is decreasing with increase in annual rainfall amount. At the southern Himalayan mountain ranges, like Nielamu and Pali stations in Tibet, orographic rainfall is induced through the uplifting of air masses. In the leeward regions of the northern Himalayan mountain ranges, like Tingri station, significantly lower rain rates are found. Therefore, the orographic effect should be incorporated into RFE 2.0 algorithm to improve its accuracy in mountain regions.
中文关键词	降水估算 ; 卫星遥感 ; 验证 ; 西藏高原
英文关键词	RFE rainfall estimation remote sensing RFE validation Tibetan Plateau
语种	中文
国家	中国
收录类别	CSCD
WOS类目	METEOROLOGY ATMOSPHERIC SCIENCES
WOS研究方向	Meteorology & Atmospheric Sciences
CSCD记录号	CSCD:4924692
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/229934
作者单位	1.中国气象局成都高原气象研究所, 成都, 四川 610072, 中国; 2.西藏自治区气象台, 拉萨, 西藏 850000, 中国
推荐引用方式 GB/T 7714	除多,罗布坚参,普布顿珠. NOAA RFE 2.0在西藏高原的验证[J],2013,29(4):581-589.
APA	除多,罗布坚参,&普布顿珠.(2013).NOAA RFE 2.0在西藏高原的验证.热带气象学报,29(4),581-589.
MLA	除多,et al."NOAA RFE 2.0在西藏高原的验证".热带气象学报 29.4(2013):581-589.