Arctic tidal characteristics at Eureka (80° N, 86° W) and Svalbard (78° N, 16° E) for 2006/07: seasonal and longitudinal variations, migrating and non-migrating tides
Arctic tidal characteristics at Eureka (80° N, 86° W) and Svalbard (78° N, 16° E) for 2006/07: seasonal and longitudinal variations, migrating and non-migrating tides
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2006/07 年尤里卡（北纬 80°，西经 86°）和斯瓦尔巴群岛（北纬 78°，东经 16°）的北极潮汐特征：季节和纵向变化、迁徙潮汐和非迁徙潮汐
DOI：
10.5194/angeo-27-1153-2009
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发表时间：
2009
影响因子：
1.9
通讯作者：
W. Ward
中科院分区：
文献类型：
--
作者：
A. Manson;C. Meek;T. Chshyolkova;Xiaoyong Xu;T. Aso;J. Drummond;C. Hall;W. Hocking;C. Jacobi;M. Tsutsumi;W. Ward
抽象的。埃尔斯米尔岛尤里卡（北纬 80°，西经 86°）的流星雷达于 2006 年 2 月开始运行。前 12 个月的风数据（82-97 公里）与斯瓦尔巴群岛阿德文特达伦（北纬 78°，东经 16°）的风相结合，流星雷达首次提供了平均风、潮汐和行星波的同期纵向间隔观测。北极高纬度地区。提供有关昼间非迁移潮汐 (NMT) 的独特极地信息，以及对南极现有半日 NMT 信息的补充信息。加拿大和挪威之间的纬向和经向月平均风存在显着差异，表明北极中层顶区域存在静止行星波（SPW）的影响。尤里卡和斯瓦尔巴群岛的日间风（D）和半日间风（SD）也表现出明显不同的强度。通常，Eureka 的 D 潮汐较大，Svalbard 的 SD 潮汐较大。北极的潮汐幅度也普遍大于根据高中纬度数据推断的预期。例如，距~90公里的时间序列显示2月至3月尤里卡的D风振荡为30 m/s，2006年6月斯瓦尔巴群岛的SD风四天爆发达到40 m/s。对迁徙潮汐和非迁徙潮汐（MT、NMT）的波数拟合成功地确定了每个月份和高度的主导潮汐。对于日潮，s=0、+2（向西）的 NMT 在非夏季月份占主导地位，而对于半日潮，s=+1、+3 的 NMT 最常出现在春分或初夏月份。这些波数与静止行星波（SPW）-潮汐相互作用一致。对SPW（S=1, 2）的全球地形强迫和大气传播的评估表明，北半球的这些冬季波浪与78-80°N日间NMT有关，但南半球冬季的SPW对夏季北极潮场影响不大。相比之下，北极冬季的大 SPW 和 NMT 可能与南极夏季观测到的半日 NMT 的发生有关，这与南极观测结果一致。
Abstract. Operation of a Meteor Radar at Eureka, Ellesmere Island (80° N, 86° W) began in February 2006. The first 12 months of wind data (82–97 km) are combined with winds from the Adventdalen, Svalbard Island (78° N, 16° E) Meteor Radar to provide the first contemporaneous longitudinally spaced observations of mean winds, tides and planetary waves at such high Arctic latitudes. Unique polar information on diurnal non-migrating tides (NMT) is provided, as well as complementary information to that existing for the Antarctic on the semidiurnal NMT. Zonal and meridional monthly mean winds differed significantly between Canada and Norway, indicating the influence of stationary planetary waves (SPW) in the Arctic mesopause region. Both diurnal (D) and semi-diurnal (SD) winds also demonstrated significantly different magnitudes at Eureka and Svalbard. Typically the D tide was larger at Eureka and the SD tide was larger at Svalbard. Tidal amplitudes in the Arctic were also generally larger than expected from extrapolation of high mid-latitude data. For example time-sequences from ~90 km showed D wind oscillations at Eureka of 30 m/s in February–March, and four day bursts of SD winds at Svalbard reached 40 m/s in June 2006. Fitting of wave numbers for the migrating and non-migrating tides (MT, NMT) successfully determines dominant tides for each month and height. For the diurnal tide, NMT with s=0, +2 (westward) dominate in non-summer months, while for the semi-diurnal tide NMT with s=+1, +3 occur most often during equinoctial or early summer months. These wave numbers are consistent with stationary planetary wave (SPW)-tidal interactions. Assessment of the global topographic forcing and atmospheric propagation of the SPW (S=1, 2) suggests these winter waves of the Northern Hemisphere are associated with the 78–80° N diurnal NMT, but that the SPW of the Southern Hemisphere winter have little influence on the summer Arctic tidal fields. In contrast the large SPW and NMT of the Arctic winter may be associated, consistent with Antarctic observations, with the observed occurrence of the semidiurnal NMT in the Antarctic summer.