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Climate trends and glacier retreat in the Cordillera Blanca, Peru, revisited

机译：秘鲁科迪勒拉布兰卡的气候趋势和冰川退缩

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The total glacial area of the Cordillera Blanca, Peru, has shrunk by more than 30% in the period of 1930 to the present with a marked glacier retreat also in the recent decades. The aim of this paper is to assess local air temperature and precipitation changes in the Cordillera Blanca and to discuss how these variables could have affected the observed glacier retreat between the 1980s and present. A unique data set from a large number of stations in the region of the Cordillera Blanca shows that after a strong air temperature rise of about 0.31 degrees C per decade between 1969 and 1998, a slowdown in the warming to about 0.13 degrees C per decade occurred for the 30 years from 1983 to 2012. Additionally, based on data from a long-term meteorological station, it was found that the freezing line altitude during precipitation days has probably not increased significantly in the last 30 years. We documented a cooling trend for maximum daily air temperatures and an increase in precipitation of about 60 mm/decade since the early 1980s. The strong increase in precipitation in the last 30 years probably did not balance the increase of temperature before the 1980s. It is suggested that recent changes in temperature and precipitation alone may not explain the glacial recession within the thirty years from the early 1980s to 2012. Glaciers in the Cordillera Blanca may be still reacting to the positive air temperature rise before 1980. Especially small and low-lying glaciers are characterised by a serious imbalance and may disappear in the near future. (C) 2014 Elsevier B.V. All rights reserved.
机译：从1930年到现在，秘鲁布朗迪亚山脉的总冰川面积缩水了30％以上，近几十年来冰川也显着退缩。本文的目的是评估布朗山脉地区的局部气温和降水变化，并讨论这些变量如何影响1980年代至今的冰川退缩。来自科迪勒拉布兰卡地区大量气象站的独特数据集显示，在1969年至1998年之间，空气温度每十年每度升高约0.31摄氏度，之后，升温速度降低到每十年约0.13摄氏度。 1983年至2012年的30年间。另外，根据长期气象站的数据，发现过去30年降水日的冻结线高度可能没有显着增加。自1980年代初以来，我们记录了每日最高气温的降温趋势，并且降水增加了约60毫米/十年。在过去30年中，降水的强劲增加可能无法平衡1980年代之前的温度上升。建议仅从温度和降水的最新变化就不能解释1980年代初至2012年这30年间的冰川衰退。山脉山脉的冰川可能仍对1980年前的正气温升高起反应。特别是低矮地势冰川的特点是严重失衡，并可能在不久的将来消失。 （C）2014 Elsevier B.V.保留所有权利。

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