【摘要】：近年來,隨著大氣環(huán)境問題研究的深入,大氣甲醛(HCHO)作為光化學煙霧的前體物以及致癌物已經(jīng)引起了人們的關注。通過區(qū)域監(jiān)測,了解其時空分布及其在大氣中的動態(tài)變化,對城市空氣質(zhì)量的安全預警具有重要意義。研究利用AURE衛(wèi)星上搭載的OMI(Ozone Monitoring Instrument)新一代大氣探測傳感器,解譯了天水地區(qū)2005~2014年對流層痕量氣體HCHO垂直柱濃度的反演數(shù)據(jù),并經(jīng)VISON、GIS等軟件聯(lián)合對該產(chǎn)品處理,探究了天水地區(qū)的HCHO的空間分布、時間變化特征及其影響因素。結果表明:研究區(qū)內(nèi)對流層HCHO垂直柱濃度在2005~2012年呈現(xiàn)持續(xù)增長趨勢,由2005年的5.06×10~(15) molec/cm~2增長至2012年的22.25×10~(15)molec/cm~2,2012~2014年表現(xiàn)出顯著下降趨勢,由2012年最高值下降至2014年的9.74×10~(15) molec/cm~2;冬、夏兩季HCHO垂直柱濃度明顯高于春、秋兩季,其中夏季最高,冬季次之;研究區(qū)東部與陜西相鄰地區(qū)及甘谷縣、武山縣部分地區(qū)呈現(xiàn)明顯高值,而天水中部區(qū)域HCHO垂直柱濃度較低,而2014年表現(xiàn)為研究區(qū)內(nèi)HCHO濃度值普遍較高。研究表明,遙感監(jiān)測對于大尺度長時間大區(qū)域大氣環(huán)境監(jiān)測提供了新的視角。
[Abstract]:In recent years, as a precursor and carcinogen of photochemical smog, atmospheric formaldehyde (HCHO) has attracted more and more attention with the further study of atmospheric environmental problems. It is of great significance for early warning of urban air quality to understand its spatio-temporal distribution and its dynamic changes in the atmosphere through regional monitoring. In this paper, the inversion data of tropospheric trace gas HCHO vertical column concentration in Tianshui area from 2005 to 2014 are interpreted by using the new generation OMI (Ozone Monitoring Instrument) atmospheric sounding sensor on AURE satellite, and the products are processed by VISON,GIS and other software. The spatial distribution, temporal variation characteristics and influencing factors of HCHO in Tianshui area were studied. The results showed that the vertical column concentration of tropospheric HCHO increased continuously from 2005 to 2012, from 5.06 脳 10 ~ (15) molec/cm~2 in 2005 to 22.25 脳 10 ~ (15) molec/cm~2,2012~ in 2012. From its peak in 2012 to 9.74 脳 10 ~ (15) molec/cm~2; in 2014 The vertical column concentration of HCHO in winter and summer was significantly higher than that in spring and autumn, the highest in summer and the second in winter. The concentration of HCHO vertical column in central Tianshui region was lower than that in eastern part of study area and Gangu County and Wushan County in the eastern part of the study area. In 2014, the concentration of HCHO in the study area was generally higher than that in the central part of Tianshui region. The research shows that remote sensing monitoring provides a new perspective for large-scale long-term and large-scale regional atmospheric environmental monitoring.
【作者單位】： 西北師范大學地理與環(huán)境科學學院;
【基金】：國家自然科學基金項目“典型區(qū)域交通代謝和路域森林生態(tài)系統(tǒng)的博弈格局研究”(41161080)
【分類號】：TP79;X87

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