The Spring-Time Boundary Layer in the Central Arctic Observed during PAMARCMiP 2009
The Spring-Time Boundary Layer in the Central Arctic Observed during PAMARCMiP 2009
复制标题
PAMARCMiP 2009 期间观测到的北极中部春季边界层
DOI：
10.3390/atmos3030320
复制
发表时间：
2012
期刊：
影响因子：
2.9
通讯作者：
Peter S. K. Liu
中科院分区：
文献类型：
--
作者：
A. Lampert;M. Maturilli;C. Ritter;Anne Hoffmann;M. Stock;A. Herber;G. Birnbaum;R. Neuber;K. Dethloff;Thomas Orgis;R. Stone;Ralf Brauner;J. Kässbohrer;C. Haas;A. Makshtas;V. Sokolov;Peter S. K. Liu
在2009年4月国际极地航空测量和北极区域气候模式模拟项目（PAMARMiP）期间，利用投下式探空仪、激光雷达、冰厚和航空原位测量等手段对北极中部的北极大气边界层（AABL）进行了表征。我们讨论了AABL观测在最低500米以上（A）开放水域，（B）海冰与许多开放/再冻结的铅（C）海冰与少数铅，和（D）封闭海冰与前修改AABL。在水面以上，AABL有近中性层结，并含有高水汽浓度。在海冰之上，观测到低的AABL顶部、低的近地面温度、强的基于地面的温度逆温和随高度增加的湿度。AABL属性和粒子浓度进行了修改的锋面系统，允许与自由大气垂直混合。在有许多铅的地区以上，位温在最低50 m处随高度而降低，在100-200 m高度以上几乎不变，表明垂直混合。后向散射系数向表面的增加是高的。在海冰上方，几乎没有再冻结的引线，稳定分层的边界层延伸到200-300米的高度。它的特点是低的比湿度和较小的增加后向散射系数朝向表面。
The Arctic atmospheric boundary layer (AABL) in the central Arctic was characterized by dropsonde, lidar, ice thickness and airborne in situ measurements during the international Polar Airborne Measurements and Arctic Regional Climate Model Simulation Project (PAMARCMiP) in April 2009. We discuss AABL observations in the lowermost 500 m above (A) open water, (B) sea ice with many open/refrozen leads (C) sea ice with few leads, and (D) closed sea ice with a front modifying the AABL. Above water, the AABL had near-neutral stratification and contained a high water vapor concentration. Above sea ice, a low AABL top, low near-surface temperatures, strong surface-based temperature inversions and an increase of moisture with altitude were observed. AABL properties and particle concentrations were modified by a frontal system, allowing vertical mixing with the free atmosphere. Above areas with many leads, the potential temperature decreased with height in the lowest 50 m and was nearly constant above, up to an altitude of 100–200 m, indicating vertical mixing. The increase of the backscatter coefficient towards the surface was high. Above sea ice with few refrozen leads, the stably stratified boundary layer extended up to 200–300 m altitude. It was characterized by low specific humidity and a smaller increase of the backscatter coefficient towards the surface.
影响因子：
--
作者：
R. Stone;A. Herber;V. Vitale;M. Mazzola;A. Lupi;R. Schnell;E. Dutton;P. Liu;Shao-Meng Li
通讯作者：
R. Stone;A. Herber;V. Vitale;M. Mazzola;A. Lupi;R. Schnell;E. Dutton;P. Liu;Shao-Meng Li
影响因子：
4.6
作者：
J. Sedlar;M. Tjernström;T. Mauritsen;M. Shupe;I. Brooks;P. Persson;C. Birch;C. Leck;A. Sirevaag;M. Nicolaus;M. Nicolaus
通讯作者：
J. Sedlar;M. Tjernström;T. Mauritsen;M. Shupe;I. Brooks;P. Persson;C. Birch;C. Leck;A. Sirevaag;M. Nicolaus;M. Nicolaus