Evaluation of the AMPS Boundary Layer Simulations on the Ross Ice Shelf with Tower Observations

Evaluation of the AMPS Boundary Layer Simulations on the Ross Ice Shelf with Tower Observations
复制标题

罗斯冰架 AMPS 边界层模拟与塔观测评估

DOI:
10.1175/jamc-d-16-0032.1
复制
发表时间:
2016
影响因子:
3
通讯作者:
Wang, Sheng-Hung
Wang, Sheng-Hung
中科院分区:
地球科学3区
文献类型:
--
作者:
Wille, Jonathan D.;Bromwich, David H.;Nigro, Melissa A.;Cassano, John J.;Mateling, Marian;Lazzara, Matthew A.;Wang, Sheng-Hung

文献摘要

参考文献

被引文献

相似文献

南极洲的飞行作业依赖于准确的天气预报,并得到主要由南极中尺度预报系统(AMPS)提供的数值预报的帮助,该系统采用了极地版本的天气研究和预报(极地WRF)模型。为了提高模式的Mellor-Yamada-Janjić(MYJ)行星边界层(PBL)方案的性能,本研究检验了30米亚历山大高塔提供的1.5年的气象数据!(ATT)2011年3月至2012年7月,罗斯冰架西部的自动气象站。处理ATT观测在10分钟的时间间隔从多个观测水平进行比较,5公里分辨率的AMPS预测运行每天在0000和1200协调世界时。ATT的比较表明,AMPS有基本的问题,湿度和操纵稳定性作为风速的函数。AMPS具有10个存储点(即,RH单位)全年相对湿度干偏差,当伯德冰川和马洛克冰川的下降风超过15 m s−1时最高。这可能是由于非局部效应,如下降流的水分含量的误差和AMPS没有参数化从吹雪升华。AMPS始终高估ATT的风速1-2 m s−1,与之前将高风速偏差归因于MYJ方案的研究一致。这导致模拟的边界层稳定性降低,从而影响模型正确模拟整个边界层的热量和动量传递的能力。
Flight operations in Antarctica rely on accurate weather forecasts aided by the numerical predictions primarily produced by the Antarctic Mesoscale Prediction System (AMPS) that employs the polar version of the Weather Research and Forecasting (Polar WRF) Model. To improve the performance of the model’s Mellor–Yamada–Janjić (MYJ) planetary boundary layer (PBL) scheme, this study examines 1.5 yr of meteorological data provided by the 30-m Alexander Tall Tower! (ATT) automatic weather station on the western Ross Ice Shelf from March 2011 to July 2012. Processed ATT observations at 10-min intervals from the multiple observational levels are compared with the 5-km-resolution AMPS forecasts run daily at 0000 and 1200 UTC. The ATT comparison shows that AMPS has fundamental issues with moisture and handling stability as a function of wind speed. AMPS has a 10-percentage-point (i.e., RH unit) relative humidity dry bias year-round that is highest when katabatic winds from the Byrd and Mulock Glaciers exceed 15 m s−1. This is likely due to nonlocal effects such as errors in the moisture content of the katabatic flow and AMPS not parameterizing the sublimation from blowing snow. AMPS consistently overestimates the wind speed at the ATT by 1–2 m s−1, in agreement with previous studies that attribute the high wind speed bias to the MYJ scheme. This leads to reduced stability in the simulated PBL, thus affecting the model’s ability to properly simulate the transfer of heat and momentum throughout the PBL.
DOI: 10.1175/mwr-d-13-00382.1
发表时间: 2014-07-01
影响因子: 3.2
作者:
Nigro, Melissa A.;Cassano, John J.
通讯作者: Cassano, John J.
南极洲罗斯岛附近行星边界层动力学的声学遥感
DOI: --
发表时间: 1993
期刊:
影响因子: --
作者:
Zhongze Liu;D. Bromwich
通讯作者: D. Bromwich
DOI: --
发表时间: 1987
期刊:
影响因子: --
作者:
T. Parish;K. Waight
通讯作者: K. Waight
DOI: 10.1002/jgrd.50128
发表时间: 2013
期刊: Journal of Geophysical Research: Atmospheres
影响因子: --
作者:
C. Genthon;D. Six;H. Gallee;P. Grigioni;A. Pellegrini
通讯作者: A. Pellegrini
DOI: 10.1175/2008waf2006100.1
发表时间: 2008
影响因子: 2.9
作者:
R. Fogt;D. Bromwich
通讯作者: D. Bromwich