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首页> 外文期刊>Atmospheric environment >Evaluation of sun photometer capabilities for retrievals of aerosol optical depth at high latitudes: The POLAR-AOD intercomparison campaigns
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Evaluation of sun photometer capabilities for retrievals of aerosol optical depth at high latitudes: The POLAR-AOD intercomparison campaigns

机译：评估太阳光度计在高纬度地区获取气溶胶光学深度的能力：POLAR-AOD比对活动

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摘要

Accuracy requirements for aerosol optical depth (AOD) in polar regions are much more stringent than those usually encountered in established sun photometer networks, while comparability of data from different archive centres is a further important issue. Therefore, two intercomparison campaigns were held during spring 2006 at Ny-Alesund (Svalbard) and autumn 2008 at Izana (Tenerife) within the framework of the IPY POLAR-AOD project, with the participation of various research institutions routinely employing different instrument models at Arctic and Antarctic stations. As reported here, a common algorithm was used for data analysis with the aim of minimizing a large part of the discrepancies affecting the previous studies. During the Ny-Alesund campaign, spectral values of AOD derived from measurements taken with different instruments were found to agree, presenting at both 500 nm and 870 nm wavelengths average values of root mean square difference (RMSD) and standard deviation of the difference (SDD) equal to 0.003. Correspondingly, the mean bias difference (MBD) varied mainly between -0.003 and +0.003 at 500 nm, and between -0.004 and +0.003 at 870 nm. During the Izana campaign, which was also intended as an intercalibration opportunity, RMSD and SDD values were estimated to be equal to 0.002 for both channels on average, with MBD ranging between -0.004 and +0.004 at 500 nm and between -0.002 and +0.003 at 870 nm. RMSD and SDD values for Angstrom exponent a were estimated equal to 0.06 during the Ny-Alesund campaign and 0.39 at Izana. The results confirmed that sun photometry is a valid technique for aerosol monitoring in the pristine atmospheric turbidity conditions usually observed at high latitudes.
机译：极地地区对气溶胶光学深度（AOD）的精度要求比建立的太阳光度计网络中通常遇到的要求更为严格，而来自不同档案中心的数据的可比性则是另一个重要问题。因此，在IPY POLAR-AOD项目的框架内，于2006年春季在Ny-Alesund（斯瓦尔巴特群岛）和2008年秋季在Izana（特内里费岛）举行了两次比对活动，各研究机构定期在北极采用不同的仪器模型和南极站。如此处报道的，一种通用算法用于数据分析，目的是最大程度地减少影响先前研究的大部分差异。在Ny-Alesund活动期间，发现使用不同仪器测得的AOD光谱值是一致的，在500 nm和870 nm波长处均显示了均方根差（RMSD）的平均值和差的标准偏差（SDD） ）等于0.003。相应地，平均偏置差（MBD）在500 nm时主要在-0.003至+0.003之间，而在870 nm时则在-0.004至+0.003之间。在Izana活动期间，这也旨在作为一次相互校准的机会，两个通道的RMSD和SDD值平均估计为0.002，在500 nm时MBD介于-0.004至+0.004之间，以及-0.002至+0.003之间在870 nm在Ny-Alesund战役期间，埃斯通指数a的RMSD和SDD值估计为0.06，在Izana为0.39。结果证实，在通常在高纬度观察到的原始大气浊度条件下，太阳光度法是一种有效的气溶胶监测技术。

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  • 来源
    《Atmospheric environment》 |2012年第6期|p.4-17|共14页
  • 作者

    M. Mazzola; R.S. Stone; A. Herber; C. Tomasi; A. Lupi; V. Vitale; C. Lanconelli; C Toledano; V.E. Cachorro; N.T. ONeill; M. Shiobara; V. Aaltonen; K. Stebel; T. Zielinski; T. Petelski; J.P. Ortiz de Galisteo; B. Torres; A. Berjon; P. Goloub; Z. Li; L. Blarel; I. Abboud; E. Cuevas; M. Stock; K.-H. Schulz; A. Virkkula;

  • 作者单位

    Institute of Atmospheric Sciences and Climate, CNR, c/o ISAC-CNR, Via Gobetti 101, 40129 Bologna, Italy;

    Cooperative Institute for Research in Environmental Sciences, University of Colorado at Boulder, Boulder, Colorado, USA,Global Monitoring Division, Earth Systems Research Laboratory, National Oceanic and Atmospheric Administration, Boulder, Colorado, USA;

    Climate Sciences, Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany;

    Institute of Atmospheric Sciences and Climate, CNR, c/o ISAC-CNR, Via Gobetti 101, 40129 Bologna, Italy;

    Institute of Atmospheric Sciences and Climate, CNR, c/o ISAC-CNR, Via Gobetti 101, 40129 Bologna, Italy;

    Institute of Atmospheric Sciences and Climate, CNR, c/o ISAC-CNR, Via Gobetti 101, 40129 Bologna, Italy;

    Institute of Atmospheric Sciences and Climate, CNR, c/o ISAC-CNR, Via Gobetti 101, 40129 Bologna, Italy;

    Group of Atmospheric Optics, University of Valladolid, Valladolid, Spain;

    Group of Atmospheric Optics, University of Valladolid, Valladolid, Spain;

    Centre d'Applications et de Recherches en Teledetection, Universite de Sherbrooke, Sherbrooke, QC, Canada;

    National Institute of Polar Research, Tokyo, Japan;

    Finnish Meteorological Institute, Helsinki, Finland;

    Polar Environmental Centre, Norwegian Institute for Air Research, Tromsø, Norway;

    Institute of Atmospheric Sciences and Climate, CNR, c/o ISAC-CNR, Via Gobetti 101, 40129 Bologna, Italy;

    Institute of Atmospheric Sciences and Climate, CNR, c/o ISAC-CNR, Via Gobetti 101, 40129 Bologna, Italy;

    Group of Atmospheric Optics, University of Valladolid, Valladolid, Spain,Institute of Atmospheric Sciences and Climate, CNR, c/o ISAC-CNR, Via Gobetti 101, 40129 Bologna, Italy;

    Group of Atmospheric Optics, University of Valladolid, Valladolid, Spain;

    Group of Atmospheric Optics, University of Valladolid, Valladolid, Spain;

    Institute of Atmospheric Sciences and Climate, CNR, c/o ISAC-CNR, Via Gobetti 101, 40129 Bologna, Italy;

    Institute of Atmospheric Sciences and Climate, CNR, c/o ISAC-CNR, Via Gobetti 101, 40129 Bologna, Italy;

    Institute of Atmospheric Sciences and Climate, CNR, c/o ISAC-CNR, Via Gobetti 101, 40129 Bologna, Italy;

    Institute of Atmospheric Sciences and Climate, CNR, c/o ISAC-CNR, Via Gobetti 101, 40129 Bologna, Italy;

    Institute of Atmospheric Sciences and Climate, CNR, c/o ISAC-CNR, Via Gobetti 101, 40129 Bologna, Italy;

    Institute of Atmospheric Sciences and Climate, CNR, c/o ISAC-CNR, Via Gobetti 101, 40129 Bologna, Italy;

    Institute of Atmospheric Sciences and Climate, CNR, c/o ISAC-CNR, Via Gobetti 101, 40129 Bologna, Italy;

    Finnish Meteorological Institute, Helsinki, Finland,Institute of Atmospheric Sciences and Climate, CNR, c/o ISAC-CNR, Via Gobetti 101, 40129 Bologna, Italy;

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  • 正文语种 eng
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  • 关键词

    aerosol; polar regions; sun photometry; optical depth; intercomparison; calibration;

    机译：气雾剂;极地地区;太阳光度法光学深度相互比较校准;

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