The temporal and spatial variation of CO<sub>2</sub> column concentration over China from 2003 to 2018 based on multi-source satellite remote sensing data

نویسندگان

چکیده

æœ¬ç ”ç©¶åˆ©ç”¨å¤§æ°”åˆ¶å›¾æ‰«ææˆåƒå¸æ”¶ä»ªSCIAMACHY (Scanning Imaging Absorption Spectrometer for Atmospheric Chartographyï¼‰å’Œå‚ é‡Œå¶å˜æ¢å ‰è°±ä»ªFTS (Fourier Transformation Spectrometerï¼‰å«æ˜Ÿé¥æ„Ÿä¼ æ„Ÿå™¨åæ¼”çš„CO2äº§å“ï¼Œç»“åˆç“¦é‡Œå ³åœ°é¢ç«™ç‚¹è§‚æµ‹çš„CO2æµ“åº¦æ•°æ®è¿›è¡ŒéªŒè¯ï¼Œå¹¶å¯¹é¥æ„Ÿæ•°æ®è¿›è¡Œæ ¡æ­£ï¼Œæœ€åŽåˆ†æžäº†2003年—2018年中国CO2æ—¶ç©ºå˜åŒ–ç‰¹å¾åŠå ¶å½±å“å› ç´ ã€‚ç»“æžœè¡¨æ˜Žï¼Œä¸­å›½åŒºåŸŸCO2柱浓度呈近12个月周期变化且持续上升的趋势。2003å¹´CO2柱浓度年均值为374.4 ppm,2018å¹´CO2柱浓度年均值为413.7 ppm,16å¹´é—´å¢žåŠ äº†39.3 ppm,约为10.51%,年均增长率为0.59%。中国区域大气CO2柱浓度的月变化存在明显的时空差异,月变化呈现弦曲线变化,最小值和最大值分别出现在8和4月,2018年月平均大约分别为407.7 ppm和416.3 ppm。CO2柱浓度的高值区主要出现在东部的亚热带和温带地区,2018年年平均最大可达417.9 ppmï¼›æœ€ä½Žå€¼æ˜¯åœ¨å† è’™å¤åŒ—éƒ¨ï¼Œ2018年平均约为409.5 ppmã€‚ä»Žçœçº§è¡Œæ”¿å•å ƒæ¥çœ‹ï¼Œ2018年平均CO2柱浓度最高和最低的省份是浙江省和青海省,分别约为417.8 ppm和412.1 ppm。中国2003年—2018å¹´CO2柱浓度在整个区域出现较大的增长,但是增长率在空间上存在明显的异质性。在空间上,2018年比2003年增长的数值在31.0—45.4 ppm之间,增长的百分比范围在8.9%—12.2%之间,增长较大的区域在高值区,最大增长出现在辽宁和吉林的交界处,约为12.2%;增长较小的区域出现在中国中部,最低的增长约为8.9%。

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ژورنال

عنوان ژورنال: Journal of remote sensing

سال: 2022

ISSN: ['1007-4619', '2095-9494']

DOI: https://doi.org/10.11834/jrs.20220355