Climatology of interhemispheric mesopause temperatures using the high- and middle-latitude meteor radars
Climatology of interhemispheric mesopause temperatures using the high- and middle-latitude meteor radars
复制标题
利用高纬度和中纬度流星雷达研究半球间中层顶温度的气候学
DOI：
10.1029/2020jd034301
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发表时间：
2021
影响因子：
4.4
通讯作者：
Dou Xiankang
中科院分区：
文献类型：
--
作者：
Yi Wen;Xue Xianghui;Reid Iain M.;Murphy Damian J.;Hall Chris M.;Tsutsumi Masaki;Ning Baiqi;Li Guozhu;Yang Guotao;Li Na;Chen Tingdi;Dou Xiankang
本文介绍了利用高纬度和中纬度流星雷达观测中层顶温度的气候学。利用南极戴维斯站（68.6°S, 77.9°E）、北极斯瓦尔巴群岛站（78.3°N, 16°E）、特罗姆瑟站（69.6°N, 19.2°E）、中纬度北部漠河站（53.5°N, 122.3°E）和北京站（40.3°N, 116.2°E）流星雷达的双极扩散系数资料估算了日中流层温度。流星雷达测得的温度的季节变化与TIMED卫星上的宽带发射辐射测量仪（SABER）测得的大气温度吻合得很好。半球间观测表明，南极和北极地区的中层顶温度表现出明显的季节不对称性。南极中层顶戴维斯站流星雷达温度的季节变化以年振荡（AO）和较弱的半年振荡（SAO）为主，夏季有明显的最小值，冬季有明显的最大值。斯瓦尔巴群岛、特罗姆瑟、漠河和北京流星雷达观测到的中高、中纬度北部中高层温度主要表现为AO，冬季最大，夏季最小。北极地区的AO比南极地区强，而南极地区的SAO比北极地区相对强。
We present the climatology of mesopause temperatures using high‐latitude and middle‐latitude meteor radars. The daily mesopause temperatures are estimated using ambipolar diffusion coefficient data from the meteor radars at Davis Station (68.6°S, 77.9°E), in Antarctica, Svalbard (78.3°N, 16°E), Tromsø (69.6°N, 19.2°E) in the Arctic, and Mohe (53.5°N, 122.3°E) and Beijing (40.3°N, 116.2°E) in the northern middle latitudes. The seasonal variations in the meteor radar‐derived temperatures are in good agreement with the temperatures from the Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) instrument onboard the TIMED satellite. Interhemispheric observations indicate that the mesopause temperatures over the southern and northern polar regions show a clear seasonal asymmetry. The seasonal variations in the Davis Station meteor radar temperatures in the southern polar mesopause are dominated by an annual oscillation (AO) with a relatively weak semiannual oscillation (SAO), which show a clear minimum during summer and a maximum during winter. The mesopause temperatures in the northern high and middle latitudes observed by the Svalbard, Tromsø, Mohe, and Beijing meteor radars mainly show an AO, with a maximum during winter and a minimum during summer. The AO in the northern polar regions is stronger than that in the southern polar regions, while the SAO in the southern polar regions is relatively strong compared to that in the northern polar regions.