COMPARISON OF STRATOSPHERIC WARMING FOLLOWING AGUNG, EL CHICHON AND PINATUBO VOLCANIC-ERUPTIONS
COMPARISON OF STRATOSPHERIC WARMING FOLLOWING AGUNG, EL CHICHON AND PINATUBO VOLCANIC-ERUPTIONS
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DOI：
10.1029/93gl00366
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发表时间：
1993-04-23
影响因子：
5.2
通讯作者：
ANGELL, JK
中科院分区：
文献类型：
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作者：
ANGELL, JK
基于63个站的无线电探空仪网络，并使用9个季节的平均气温来尽量减少准两年一次振荡的影响，阿贡和奇琼之后的低平流层（16-20公里）变暖在赤道地区最大，在极地地区最小。然而，变暖相对于赤道并不对称，赤道以南地区的变暖程度大于赤道以北地区。除南极地区外，所有气候带中，奇琼气候之后的变暖幅度均略高于阿贡气候之后的变暖程度。由于火山喷发不久，皮纳图博火山的结果是初步的，但在北温带和热带地区，这次喷发后的变暖与阿贡和奇琼火山后的变暖相当。然而，在南温带和极地地区，皮纳图博火山之后的变暖幅度要大得多，这可能反映了智利哈德逊山喷发的影响。 因此，从全球范围来看，皮纳图博火山之后的低平流层变暖程度要大于阿贡火山或奇琼火山之后的低平流层变暖程度。根据包含更高高度数据的 10 站热带无线电探空仪网络，奇琼飓风之后的变暖超过阿贡之后的变暖，高度至少达到 31 公里，变暖的差异随着高度的增加而增加。皮纳图博火山之后的变暖与阿贡到达 24 公里高度之后的变暖相似，但此后表明变暖程度有所减弱，随着更多数据的出现，这一意外结果需要重新审查。
Based on a 63-station radiosonde network and using 9-season-average temperatures to minimize the influence of the quasi-biennial oscillation, the low-stratospheric (16-20 km) warming following Agung and El Chichon was greatest in the equatorial zone and least in polar zones. The warming was not symmetric with respect to the equator, however, with greater warming south than north of the equator. The warming following El Chichon was slightly greater than following Agung in all climatic zones except the south polar zone. Results for Pinatubo are preliminary because of the recency of the eruption, but in north extratropics and tropics the warming following this eruption is indicated to be comparable to the warming following Agung and El Chichon. However, in south temperate and polar zones the warming is considerably greater following Pinatubo, perhaps reflecting a contribution from the eruption of Cerro Hudson in Chile. Globally, therefore, the low-stratospheric warming following Pinatubo is greater than following Agung or El Chichon. Based on a 10-station tropical radiosonde network with data to greater heights, the warming following El Chichon exceeded the warming following Agung to a height of at least 31 km, the difference in warming increasing with height. The warming following Pinatubo is similar to that following Agung to a height of 24 km, but thereafter is indicated to become less, an unexpected result to be reexamined as more data become available.