The Southern Hemisphere westerly wind belt (SHWW) is a major feature of Southern Hemisphere, midlatitude climate that is closely linked with the sequestration and release of CO2 in the Southern Ocean. Past changes in the strength and position of this wind belt are poorly resolved, particularly across the Pleistocene-Holocene transition, a time period associated with fluctuations in atmospheric temperatures and CO2 levels. We used dust geochemistry, particle size measurements, and paleoecological analyses from a peat sequence in the Falkland Islands, South Atlantic Ocean, to describe changes in the SHWW between 16.0 and 6.5 ka (thousands of years before CE 1950). Wind strength was low at ~51°S before and during the Antarctic Cold Reversal (ACR, 14.9–13.0 ka), intensified between 13.1 and 12.1 ka as atmospheric temperatures increased, and then weakened, reaching a minimum between 12.1 and 10.9 ka during the Early Holocene thermal maximum. Northwesterly air masses became more dominant from 12.0 to 10.2 ka, and wind strength remained low until our record was affected by a storm surge or tsunami ca. 7.8 ka. These data indicate a southward shift in the latitude of the SHWW, from north of 51°S prior to and during the ACR, at ~51°S before the onset of the Holocene, and south of 51°S during the early Holocene thermal maximum. This pattern suggests that the latitude of the SHWW was coupled with atmospheric temperatures through the Pleistocene-Holocene transition.

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来自南大西洋福克兰群岛的南半球西风动力学晚冰期-全新世记录

南半球西风带（SHWW）是南半球的一个主要特征，是与南大洋CO2封存和释放密切相关的中纬度气候。过去这条风带强度和位置的变化很难解决，特别是在更新世-全新世过渡期间，这是一个与大气温度和二氧化碳水平波动相关的时间段。我们使用来自南大西洋福克兰群岛泥炭序列的尘埃地球化学、粒度测量和古生态分析来描述 SHWW 在 16.0 到 6.5 ka（CE 1950 之前的数千年）之间的变化。在南极冷逆转（ACR，14.9-13.0 ka）之前和期间，风强度低至约 51°S，随着大气温度升高，在 13.1 和 12.1 ka 之间增强，然后减弱，在全新世早期热最大值期间达到最小值 12.1 和 10.9 ka。西北气团从 12.0 到 10.2 ka 变得更加占主导地位，风强度一直很低，直到我们的记录受到风暴潮或海啸的影响。7.8 卡。这些数据表明SHWW的纬度向南移动，从ACR之前和期间的51°S以北，全新世开始前的~51°S，以及全新世早期热最大值期间的51°S以南. 这种模式表明，SHWW 的纬度通过更新世-全新世过渡与大气温度耦合。风强度一直很低，直到我们的记录受到风暴潮或海啸的影响。7.8 卡。这些数据表明SHWW的纬度向南移动，从ACR之前和期间的51°S以北，全新世开始前的~51°S，以及全新世早期热最大值期间的51°S以南. 这种模式表明，SHWW 的纬度通过更新世-全新世过渡与大气温度耦合。风强度一直很低，直到我们的记录受到风暴潮或海啸的影响。7.8 卡。这些数据表明SHWW的纬度向南移动，从ACR之前和期间的51°S以北，全新世开始前的~51°S，以及全新世早期热最大值期间的51°S以南. 这种模式表明，SHWW 的纬度通过更新世-全新世过渡与大气温度耦合。