Research on land surface temperature downscaling method based on diurnal temperature cycle model deviation coefficient calculation

نویسندگان

چکیده

地表温度LST(Land Surface Temperatureï¼‰æ˜¯å ¨çƒæ°”å€™å˜åŒ–ç ”ç©¶çš„å ³é”®å‚æ•°ï¼Œé¥æ„Ÿæ˜¯èŽ·å–å ¨çƒå’ŒåŒºåŸŸå°ºåº¦åœ°è¡¨æ¸©åº¦çš„ä¸€ç§åˆ‡å®žå¯è¡Œæ‰‹æ®µï¼Œä½†çŽ°æœ‰çš„å•ä¸€ä¼ æ„Ÿå™¨æ— æ³•æä¾›é«˜æ—¶ç©ºåˆ†è¾¨çŽ‡çš„LSTæ•°æ®ï¼Œé™åˆ¶äº†é¥æ„Ÿåœ°è¡¨æ¸©åº¦æ•°æ®çš„æ·±å ¥å¹¿æ³›åº”ç”¨ã€‚çŽ°æœ‰çš„é™å°ºåº¦æ–¹æ³•éš¾ä»¥ç”Ÿæˆæ— ç¼é«˜æ—¶ç©ºåˆ†è¾¨çŽ‡çš„åœ°è¡¨æ¸©åº¦æ•°æ®ï¼Œä¸”é™å°ºåº¦æ•ˆæžœæ˜“å—é«˜ç©ºé—´åˆ†è¾¨çŽ‡LST数据缺失及有效时刻分布影响。本文提出了一种基于地表温度日变化模型DTC(Diurnal Temperature Cycle)偏差系数解算的地表温度降尺度方法,采用FY-4A、MODIS和Landsat 8的LST数据生成晴空及多云条件下逐小时100 mçš„æ— ç¼LSTæ•°æ®ã€‚æ–¹æ³•ä¸»è¦åŒ å«4部分:(1ï¼‰åˆ©ç”¨ç©ºå€¼é‡å»ºæ–¹æ³•èŽ·å–æ— ç¼çš„FY-4A的LST数据;(2)建立FY-4A LST数据的DTC模型;(3)采用时空融合模型对MODIS的LST数据进行空间降尺度;(4)解算DTC模型偏差系数,获取逐小时100 måˆ†è¾¨çŽ‡çš„æ— ç¼LSTæ•°æ®ã€‚å®žéªŒç»“æžœè¡¨æ˜Žï¼Œæœ¬æ–‡æå‡ºçš„æ–¹æ³•å ·æœ‰è¾ƒé«˜çš„é™å°ºåº¦ç²¾åº¦ï¼Œå¯èŽ·å¾—æ™´ç©ºåŠå¤šäº‘æ¡ä»¶ä¸‹æ— ç¼é«˜æ—¶ç©ºåœ°è¡¨æ¸©åº¦æ•°æ®ï¼Œä¸”é«˜ç©ºé—´åˆ†è¾¨çŽ‡çš„åœ°è¡¨æ¸©åº¦æ•°æ®ç¼ºå¤±å’Œæœ‰æ•ˆæ—¶åˆ»åˆ†å¸ƒå¯¹æœ¬æ–‡æ–¹æ³•é™å°ºåº¦ç»“æžœå½±å“è¾ƒå°ã€‚

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ژورنال

عنوان ژورنال: Journal of remote sensing

سال: 2021

ISSN: ['1007-4619', '2095-9494']

DOI: https://doi.org/10.11834/jrs.20211181