Ice cores collected from polar ice sheets at Site M, Dronning Maud Land, East Antarctica (Lat 75.00 S, Long 15.00 E), and Holtedahlfonna, Svalbard (Lat 79.13 N, Long 13.27 E), were analyzed for a net deposition of 25 organochlorine pesticides (OCPs) and 16 organohalogen (chlorine/bromine) industrial compounds (OHICs). Long-range atmospheric transport (LRAT) delivers contaminants to both sites, but the processes are different: Site M is affected by subsidence of air from the stratosphere to the Antarctic Plateau, while Holtedahlfonna is affected by air moving through the free troposphere. The sample from Site M is a composite core covering 1958–2000, while the Holtedahlfonna sample includes a historic record from 1953 to 2005 in six discrete samples. The five highest OCPs at Site M were chlorpyrifos, trans-chlordane, 4,4′-dichlorodiphenyl trichloroethane (DDT), ß-hexachlorocyclohexane (HCH), and dieldrin, while at Holtedahlfonna, they were chlorpyrifos, γ-HCH, α-HCH, ß-HCH, and dieldrin. The five most abundant OHICs at Site M were three dichlorobenzenes (diCBs), 1,3-diCB, 1,4-diCB, 1,2-diCB, and 1,3,5-trichlorobenzene and 1,2,4,5-tetrachlorobenzene (tetraCB) and at Holtedahlfonna, they were the same three diCB, pentachloroanisole (PCA), and 1,2,4,5-tetraCB. Of the OHICs, only hexachlorobutadiene, PCA, and hexachlorobenzene were found in all six Holtedahlfonna ice-core segments. Principal component analysis of the OCP percent of total flux values shows no similar variance among the Holtedahlfonna core segments, the whole-core value, or Site M. The principal component analysis of OHIC shows no consistent variance among any of the samples except for two Holtedahlfonna segments with the lowest OHIC values in the core.

中文翻译：

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南极和北极冰川冰芯的历史大气有机氯农药和卤化工业化合物输入

分析了从南极洲东部 Dronning Maud Land（南纬 75.00 度，东经 15.00 度）和斯瓦尔巴群岛霍尔特达尔福纳（北纬 79.13 度，东经 13.27 度）的极地冰盖 M 处收集的冰芯，分析了 25 有机氯的净沉积农药 (OCP) 和 16 种有机卤素（氯/溴）工业化合物 (OHIC)。远程大气传输 (LRAT) 将污染物输送到两个站点，但过程不同：站点 M 受到从平流层到南极高原的空气下沉的影响，而 Holtedahlfonna 受到穿过自由对流层的空气的影响。来自 Site M 的样本是一个覆盖 1958-2000 年的复合岩心，而 Holtedahlfonna 样本包括 1953 年到 2005 年的六个离散样本的历史记录。站点 M 的五个最高 OCP 是毒死蜱、反式-氯丹，4,4' -二氯二苯基三氯乙烷 (DDT)、β-六氯环己烷 (HCH) 和狄氏剂，而在 Holtedahlfonna，它们是毒死蜱、γ-HCH、α-HCH、β-HCH 和狄氏剂。站点 M 的五种最丰富的 OHIC 是三种二氯苯 (diCBs)、1,3-diCB、1,4-diCB、1,2-diCB 和 1,3,5-三氯苯和 1,2,4,5-四氯苯 (tetraCB) 和 Holtedahlfonna，它们是相同的三种 diCB、五氯苯甲醚 (PCA) 和 1,2,4,5-tetraCB。在 OHIC 中，在所有六个 Holtedahlfonna 冰芯段中只发现了六氯丁二烯、PCA 和六氯苯。总通量值的 OCP 百分比的主成分分析显示 Holtedahlfonna 岩心段、整个岩心值或站点 M 之间没有类似的差异。