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上甸子秋冬季雾霾期间气溶胶光学特性
Characteristics of Aerosol Optical Properties During Haze and Fog Episodes at Shangdianzi in Northern China
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摘要: 通过对2004年秋冬季(9-12月)4次雾霾天气过程在京、津背景地区--北京上甸子大气本底污染监测站观测的大气气溶胶光学特性的分析，发现该地区气溶胶光学特性受天气过程的影响很大。4次雾霾影响时段，平均气溶胶散射系数σsca、吸收系数σabs和单次散射反照率ω都远高于雾霾过后清洁时段的数值，其中气溶胶ω在雾霾影响时段为0.94~0.97，雾霾后为0.84~0.86，平均减小了0.1左右，表明雾霾天气有利于气溶胶的累积和生成。相比于光吸收性气溶胶，雾霾天气对光散射性气溶胶的增加更为有利，反映了二次气溶胶的产生及其对消光的贡献可能有较大增加。
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关键词:
- 雾霾过程;
- 气溶胶散射、吸收特性;
- 单次散射反照率
Abstract: The Northern China is one of the regions with the high incidence of fog and haze. With the rapid development of economy in the recent years, the anthropogenic pollutants, such as aerosol and its precursors have brought about serious visibility degradations in the regions. In the fall of 2004, several heavy fog and haze episodes with visibility less than 1 km are observed at Shangdianzi (SDZ) Atmospheric Background Station. During the fog and haze periods, aerosol scattering and absorption coefficients are measured simultaneously at the Station with Nephelometer (M9003, ECOTECH) and 7 band Aethalometer (AE31, Magee Scientific). The results of aerosol optical properties indicate that aerosols over the region are strongly influenced by weather conditions. Under the influence of fog and haze, aerosols at the Station show higher values of scattering and absorption coefficient and higher aerosol single scattering albedo (ω), while relatively lower aerosol scattering coefficient, absorption coefficient and ω are observed after the haze and fog episodes. For the 4 fog/haze episodes, the aerosol single scattering albedo decreases by about 0.1, with the value of 0.94-0.97 during the fog/haze influencing periods and the lower value of 0.84-0.86 during the cleaner periods after the fog/haze process. Through a detailed analysis of the time series of the surface aerosol optical properties for a heavy fog and haze case, combined with the column AOD and weather condition changes, the evolution of aerosol optical properties are discussed. It is found that the fog and haze event takes on significant regional effects, air masses from polluted directions leads to higher ω, higher scattering and absorption coefficients of aerosols. This result suggests that the haze and fog weather conditions favor the accumulation of aerosol pollutants, especially favor the production of the light scattering aerosols, which reflect that the formation of secondary aerosols and their contribution to the light extinctions might be more significant during the haze and fog influencing periods. -
图 1 上甸子大气本底污染监测站地理位置及周边主要城市分布图
Fig. 1 The location of the Shangdianzi Station and the major cities surrounding the site
图 2 2004年10月NODIS卫星反演的上甸子站及周边地区AOD分布 (图中红色三角表示上甸子站位置)
Fig. 2 The MODIS retrieved AOD over Shangdianzi Station and the surrounding regions in October 2004 (the red triangle represents the site location)
图 3 2004年10月1—11日观测期间地面10m风矢量 (a)，相对湿度 (b)，温度 (c)，单次散射反照率ω(d)，散射系数 (e)，吸收系数 (f)
Fig. 3 Time series of surface wind vectors at 10 meters (a), relative humidity (b), temperature (c)，aerosol single scattering albedo ω(d) , aerosol scattering coefficients (e), aerosol absorption coefficients(f) during 1—11 October 2004
图 4 2004年10月1—10日08:00925hPa天气图
Fig. 4 The weather charts of 925 hPa at 08: 00 during 1—10 October 2004
表 1 2004年9—12月4次雾霾过程定时观测的能见度 (目测)、最低能见度和最大相对湿度
Table 1 The routine observations of visibility, minimum visibility and relative humidity during the four fog/haze events from September to December in 2004
表 2 2004年9—12月4次雾霾影响时段及清洁时段平均气溶胶光学特性
Table 2 The average aerosol optical properties observed in the periods during and after the influence of fog/haze from September to December in 2004
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[1] IPCC.Climate Change 2007:The Physical Science Basis.Cambridge:Cambridge University Press, 2007. [2] Warner J, Twomey S A.The production of cloud nuclei by cane fires and the effect on cloud droplet concentration.J Atmos Sci, 1967, 24:704-706. http://adsabs.harvard.edu/abs/1967JAtS...24..704W [3] Twomey S A.Pollution and the planetary albedo.Atmos Environ, 1974, 8:1251-1256. [4] Twomey S A.The influence of pollution on the shortwave albedo of clouds.J Atmos Sci, 1977, 34:1149-1152. doi: 10.1175/1520-0469(1977)034<1149:TIOPOT>2.0.CO;2 [5] Ackerman A S, Toon O B, Stevens D E, et al.Reduction of tropical cloudiness by soot.Science, 2000, 288:1042-1047. http://science.sciencemag.org/content/288/5468/1042 [6] Chameides W L, Luo C, Saylor R, et al.Correlation between model-calculated anthropogenic aerosols and satellite-derived cloud optical depths:Indication of indirect effects? J Geophys Res, 2002, 107 (D10) :doi:10.1029/2000JD000208. [7] Rosenfeld D.TRMM observed first direct evidence of smoke from forest fires inhibiting rainfall.Geophys Res LeU, 1999, 26(20) :3105-3108. doi: 10.1029/1999GL006066 [8] Ramanathan V, Crutzen P Jt Kiehl J T, et al.Aerosols, climate, and the hydrological cycle.Science, 2001, 294(5549) :2119-2124. doi: 10.1126/science.1064034 [9] Menon S, Hansen J, Nazarenko L, et al.Climate effects of black carbon aerosols in China and India.Science, 2002, 297:2250-2253. http://science.sciencemag.org/content/297/5590/2250 [10] Jacobson M Z.Strong radiative heating due to the mixing state of black carbon in atmospheric aerosols.Nature, 2001, 409:695-697. doi: 10.1038/35055518 [11] Jacobson M Z.Control of fossil-fuel particulate black carbon and organic matter, possibly the most effective method of slowing global warming.J Geophys Res, 2002, 107(D19), 4410, doi: 10.1029/2001JD001376. [12] Cooke W F, Liousse C, Cachier H, et al.Construction of a 1°×1° fossil fuel emission data set for carbonaceous aerosol and implementation and radiative impact in the ECHAM4 model.J Geophys Res, 1999, 104:22137-22162. doi: 10.1029/1999JD900187/epdf [13] 吴兑, 廖国莲, 邓雪娇, 等.珠江三角洲霾天气的近地层输送条件研究.应用气象学报, 2008, 19(1) :1-9. http://qikan.camscma.cn/jams/ch/reader/view_abstract.aspx?file_no=20080102&flag=1 [14] 黄健, 吴兑, 黄敏辉, 等.1954-2004年珠江三角洲大气能见度变化趋势.应用气象学报, 2008, 19(1) :61-70. http://qikan.camscma.cn/jams/ch/reader/view_abstract.aspx?file_no=20080111&flag=1 [15] 胡敏, 赵云良, 何凌燕, 等.北京冬、夏季颗粒物及其离子成分质量浓度谱分布.环境科学, 2005, 26(4) :1-6. http://www.cnki.com.cn/Article/CJFDTOTAL-HJKZ200504001.htm [16] Bergin M, Cass G R, Xu J, et al.Aerosol radiative, physical, and chemical properties in Beijing during June 1999.J Geophys Res, 2001, 106(D16) :17969-17980. doi: 10.1029/2001JD900073 [17] 毛节泰, 李成才.气溶胶辐射特性的观測研究.气象学报, 2005, 63(5) :622-635. http://www.cnki.com.cn/Article/CJFDTOTAL-QXXB200505007.htm [18] 徐祥德, 施晓晖, 张胜军, 等.北京及周边城市群落气溶胶影响域及其相关气候效应.科学通报, 2005, 50(22) :2522-2530. http://www.cnki.com.cn/Article/CJFDTOTAL-KXTB200522014.htm [19] 张仁健, 王明星, 胡非, 等.采暖期前和采暖期北京大气颗粒物的化学成分研究.中国科学院研究生院学报, 2002, 19 (1) :75-81. http://www.cnki.com.cn/Article/CJFDTOTAL-ZKYB200201009.htm [20] 韩力慧, 庄国顺, 孙业乐, 等.北京大气颗粒物污染本地源于外来源的区分.中国科学(B辑), 2005, 35(3) :237-246. [21] 王京丽, 刘旭林.北京市大气细粒子质量浓度与能见度定量关系初探.气象学报, 2006, 64(2) :221-228. http://www.cnki.com.cn/Article/CJFDTOTAL-QXXB200602009.htm [22] 吴兑, 毕雪岩, 邓雪娇, 等.珠江三角洲大气灰霾导致能见度下降问题研究.气象学报, 2006, 64(4) :510-517. http://www.cnki.com.cn/Article/CJFDTOTAL-QXXB200604010.htm [23] 李晓静, 张鹏, 张兴赢, 等.中国区域MODIS陆上气溶胶光学厚度产品检验.应用气象学报, 2009, 20(2) :147-156. http://qikan.camscma.cn/jams/ch/reader/view_abstract.aspx?file_no=20090203&flag=1 [24] 徐祥德, 丁国安, 卞林根.北京城市大气环境污染机理与调控原理.应用气象学报, 2006, 17(6) :815-828. http://qikan.camscma.cn/jams/ch/reader/view_abstract.aspx?file_no=200606129&flag=1 [25] 胡亚旦, 周自江.中国霾天气的气候特征分析.气象, 2009, 35(7): 73-78. http://www.cnki.com.cn/Article/CJFDTOTAL-QXXX200907012.htm [26] 王继志, 徐祥德, 杨元琴.北京城市能见度及雾特征分析.应用气象学报, 2002, 13(增刊):160-169. http://www.cnki.com.cn/Article/CJFDTOTAL-YYQX2002S1017.htm [27] Yan P, TangJ, HuangJ, et al.The measurement of aerosol optical properties at a rural site in Northern China.Atmos Chem Phys, 2008, 8:2229-2242. http://www.atmos-chem-phys.net/8/2229/2008/acp-8-2229-2008.pdf [28] Hansen A D A, Rosen H, Novakov T.The Aethalometer_ An instrument for the real-time measurement of optical absorption by aerosol particles.Science of the Total Environment, 1984, 36:191-196. doi: 10.1016/0048-9697(84)90265-1 [29] Schmid O, Chand D, Andreae M O.Aerosol Optical Properties in Urban Guangzhou.PRD Workshop, Beijing, 2005. [30] Moosmuller H, Amott W P, Rogers C F, et al.Photoacoustic and filter measurements related to aerosol light absorption during the Northern Front Range Air Quality Study (Colorado 1996/1997).J Geophys Res, 1998, 103CD21)； 28149-28157. [31] Arnott W P, Moosmuller H, Sheridan P J, et al.Photoacoustic and filter-based ambient aerosol light absorption measurements:Instrument comparisons and the role of relative humidity.J Geophys Res, 2003, 108(Dl):4034, 10.1029/2002JD002165. doi: 10.1029/2002JD002165 [32] Barnard J C, Kassianov E I, Ackerman T P, et al.Measurements of black carbon specific absorption in the Mexico City Metropolitan Area during the MCMA 2003 Field Campaign.Atmos Chem Phys Discuss, 2005, 5:4083-4113. doi: 10.5194/acpd-5-4083-2005 -
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