基于FY-4A的一種自適應(yīng)閾值對(duì)流云提取算法

doi:10.12306/2020jms.0024

首頁(yè) > 過刊瀏覽>2021年第41卷第3期 >398-403. DOI:10.12306/2020jms.0024

基于FY-4A的一種自適應(yīng)閾值對(duì)流云提取算法
DOI:
                        10.12306/2020jms.0024
                    
CSTR:
                        
                    
作者:
                        
                        
                    
作者單位:
作者簡(jiǎn)介:
通訊作者:
中圖分類號(hào):P49
基金項(xiàng)目:江蘇省第四期"333高層次人才培養(yǎng)工程"科研項(xiàng)目（BRA2014373）

An adaptive thresholding algorithm for convective cloud recognition based on FY-4A satellite

Author:

Affiliation:

Fund Project:

摘要

圖/表

訪問統(tǒng)計(jì)

參考文獻(xiàn)

相似文獻(xiàn)

引證文獻(xiàn)

資源附件

文章評(píng)論

摘要:

以臺(tái)風(fēng)"利奇馬"帶來的強(qiáng)對(duì)流天氣過程為例，利用FY-4A氣象衛(wèi)星先進(jìn)靜止軌道輻射成像儀的水汽與紅外窗區(qū)通道亮溫?cái)?shù)據(jù)，對(duì)照全國(guó)氣象雷達(dá)組合反射率拼圖數(shù)據(jù)中反射率因子大于35 dBZ的對(duì)流云區(qū)域，設(shè)計(jì)了一種自適應(yīng)閾值對(duì)流云提取算法。結(jié)果表明：（1）FY-4A氣象衛(wèi)星使用水汽—紅外窗區(qū)亮溫差法提取對(duì)流云，其最佳閾值為-2 K，使用該閾值可最大程度地減少卷云噪聲干擾，同時(shí)可最大化提取對(duì)流云的準(zhǔn)確率與識(shí)別率。（2）該算法通過控制水汽—紅外窗區(qū)亮溫差大于-2 K區(qū)域所占云團(tuán)面積比使其大于80％提取較為完整的對(duì)流云，且可進(jìn)一步過濾卷云等噪聲。自適應(yīng)閾值對(duì)流云提取算法原理清晰，操作簡(jiǎn)單，具有良好的拓展性，可為強(qiáng)對(duì)流天氣的短臨預(yù)報(bào)等研究提供參考。

Abstract:

Based on the water vapor channel and infrared window channel of FY-4A advanced geosynchronous radiation imager, compared with the convective cloud regions with reflectivity factor greater than 35 dBZ in the national weather radar combined reflectivity mosaic data, an adaptive thresholding algorithm for convective cloud recognition by taking the severe convective weather caused by typhoon "Lekima" as an example was designed. Results show that: (1)-2 K is the best threshold for convective cloud recognition by using the brightness temperature difference between water vapor and infrared window channel of FY-4A meteorological satellite, which can reduce the noise interference of cirrus cloud and maximize the accuracy and recognition rate of convective cloud recognition. (2) The algorithm can extract relatively complete convective clouds by controlling the area ratio of the cloud cluster in the region where the brightness temperature difference between water vapor and infrared window is greater than -2 K to make it greater than 80％, and can further filter cirrus and other noises. The algorithm has clear principle, simple operation and good expansibility, which can provide reference for short-term and impending forecast on severe convective weather.

參考文獻(xiàn)

相似文獻(xiàn)

引證文獻(xiàn)

引用本文

紀(jì)丞,曾燕,邱新法,黃勇.基于FY-4A的一種自適應(yīng)閾值對(duì)流云提取算法.氣象科學(xué),2021,41(3):398-403 JI Cheng, ZENG Yan, QIU Xinfa, HUANG Yong. An adaptive thresholding algorithm for convective cloud recognition based on FY-4A satellite. Journal of the Meteorological Sciences,2021,41(3):398-403

復(fù)制

文章指標(biāo)

點(diǎn)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:2020-03-09
最后修改日期:
錄用日期:
在線發(fā)布日期: 2021-07-05
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

<s id="ka4gu"></s>

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