FY-3A衛(wèi)星微波資料的集合變分混合同化試驗

doi:10.3969/2017jms.0058

首頁 > 過刊瀏覽>2018年第38卷第5期 >606-615. DOI:10.3969/2017jms.0058

FY-3A衛(wèi)星微波資料的集合變分混合同化試驗
DOI:
                        10.3969/2017jms.0058
                    
CSTR:
                        
                    
作者:
                        
                        
                    
作者單位:
作者簡介:
通訊作者:
中圖分類號:
基金項目:國家自然科學(xué)基金資助項目（41375063）

Assimilation experiments of FY-3A satellite microwave data based on hybrid variational-ensemble assimilation method

Author:

Affiliation:

Fund Project:

摘要

圖/表

訪問統(tǒng)計

參考文獻(xiàn)

相似文獻(xiàn)

引證文獻(xiàn)

資源附件

文章評論

摘要:

以2012年"北京7.21暴雨"為例，實現(xiàn)了集合變分混合同化方法對FY-3A的微波溫度儀和微波濕度儀資料的直接同化，并與三維變分方法進(jìn)行了比較。結(jié)果表明：雖然兩種同化方法同化FY-3A微波資料都能改進(jìn)降水模擬效果，但是與實況相比，集合變分混合同化方法改進(jìn)效果更為明顯，其能有效減少虛假強降水的模擬，改進(jìn)強降水中心位置的模擬，SAL評分定量檢驗也同樣表明，集合變分混合同化方法對暴雨的模擬效果要優(yōu)于三維變分同化方法；無論是熱力學(xué)變量還是動力學(xué)變量，集合變分同化得到的初始場均方根誤差均顯著小于三維變分同化的結(jié)果；兩種方法同化FY-3A微波資料均能改變初始場中的各種物理量信息，但不同方法得到的同化增量大小和分布卻有明顯的差異：三維變分同化方法對初始場的調(diào)整區(qū)域和強度都要大于混合同化方法，且其同化增量表現(xiàn)出均勻和各向同性的分布特點；而利用集合信息的混合同化方法得到的同化增量分布表現(xiàn)為非均勻性和各向異性，具有"流依賴性"的特征，這使得初始場的分布更合理，有利于改善降水的模擬效果。

Abstract:

Using Hybrid variational-ensemble data assimilation method directly assimilate both Microwave Temperature Sounder (MWTS) data and Microwave Humidity Sounder (MWHS) data of FY-3A satellite in the case of the historical Beijing "7.21" extreme precipitation event in 2012, and compared to the three-dimensional variational assimilation method. Results show that both assimilation methods can improve the simulated precipitation results,but the Hybrid variational-ensemble data assimilation method is better than the three-dimensional variational assimilation method,which can effectively reduce the false heavy rainfall, and improve the simulation of the location of heavy rainfall center. The result of the SAL quantitative verification method for precipitation forecast shows the same conclusion. Comparing the root mean square error between the initial field and the reanalysis data obtained those two methods, the results of the the Hybrid variational-ensemble data assimilation method is smaller than the three-dimensional variational assimilation method,which means the analysis field of the Hybrid variational-ensemble data assimilation method is closer to real situation than that of the three-dimensional variational assimilation method. Both assimilation methods can change the physical information in the initial field, but the increments produced by those two methods are different in both magnitude and distribution. Three-dimensional variational assimilation method affects larger region in the simulation area for wind field,temperature field and relative humidity field than that of the Hybrid variational-ensemble data assimilation method. Increments obtained by the three-dimensional variational assimilation method are nearly homogeneous and isotropic,while increments obtained by the Hybrid variational-ensemble data assimilation method are inhomogeneous,anisotropic and "flow-dependent". Hybrid variational-ensemble data assimilation method makes the distribution of the initial field more reasonable, and it can improve the simulation of precipitation.

參考文獻(xiàn)

相似文獻(xiàn)

引證文獻(xiàn)

引用本文

謝賓鵬,張立鳳,張明陽,楊雨軒,湯鵬宇. FY-3A衛(wèi)星微波資料的集合變分混合同化試驗.氣象科學(xué),2018,38(5):606-615 XIE Binpeng, ZHANG Lifeng, ZHANG Mingyang, YANG Yuxuan, TANG Pengyu. Assimilation experiments of FY-3A satellite microwave data based on hybrid variational-ensemble assimilation method. Journal of the Meteorological Sciences,2018,38(5):606-615

復(fù)制

文章指標(biāo)

點擊次數(shù):
下載次數(shù):
HTML閱讀次數(shù):
引用次數(shù):

歷史

收稿日期:2017-05-22
最后修改日期:2017-07-07
錄用日期:
在線發(fā)布日期: 2018-10-12
出版日期:

文章二維碼

您是第位訪問者
氣象科學(xué) ® 2026 版權(quán)所有
技術(shù)支持：北京勤云科技發(fā)展有限公司

抽查舔水白紧大视频,冲喜娘子超甜哒激情五月,亚洲黄色图片偷拍网站,亚洲三级黄片免费播放,91在线观看喷潮红桃,日韩精品在线观看一区二区,久久久久久久久久久久黄色片子,日产精品99久久久久久久久,欧洲亚洲另类图片小说

引用本文

分享

相關(guān)視頻

文章指標(biāo)

歷史

文章二維碼

抽查舔水白紧大视频,冲喜娘子超甜哒 激情五月,亚洲黄色图片偷拍网站,亚洲三级黄片免费播放,91在线观看喷潮红桃,日韩精品在线观看一区二区,久久久久久久久久久久黄色片子,日产精品99久久久久久久久,欧洲亚洲另类图片小说

引用本文

分享

相關(guān)視頻

文章指標(biāo)

歷史

文章二維碼

抽查舔水白紧大视频,冲喜娘子超甜哒激情五月,亚洲黄色图片偷拍网站,亚洲三级黄片免费播放,91在线观看喷潮红桃,日韩精品在线观看一区二区,久久久久久久久久久久黄色片子,日产精品99久久久久久久久,欧洲亚洲另类图片小说