Numerical experiments on the inland penetration of the sea breeze
Numerical experiments on the inland penetration of the sea breeze
复制标题
海风向内陆渗透的数值试验
DOI：
10.1002/qj.49710645007
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发表时间：
1980
影响因子：
8.9
通讯作者：
W. Physick
中科院分区：
文献类型：
--
作者：
W. Physick
一个二维连续方程模式被用来研究海风现象的各个方面。通过改变下垫面的波文比来研究土壤含水量的影响。这相当于控制地面感热通量的大小，因为净辐射减去地面热通量的日变化在所有情况下大致相同。结果表明，海风的内陆穿透率随土壤湿度的变化而显著变化。该模型预测了一个显着放缓的正面推进中午前后的情况下，“相对较弱”的显着加热的土地，以及再现锋加速度在下午晚些时候观察到的所有情况下。海风环流在日落前后从海岸线上分离出来，并迅速向内陆移动，幅度逐渐减小，这方面的讨论与英格兰南部的观测有关。
试图模拟1973年6月14日英格兰南部的海风。各种实验进行了讨论，其中包括一个不同的值的鲍文比指定的前面和后面的前面。相当好的协议被发现，虽然它是不可能重现的所有功能的内陆渗透曲线的那一天。
简要讨论了这些实验对中尺度模式生产每日预报的影响。
A two-dimensional primitive-equation model is used to investigate various aspects of the sea-breeze phenomenon. The influence of soil moisture content is examined by varying the Bowen ratio of the underlying land surface. This is equivalent to controlling the magnitude of the sensible heat flux at the ground since the diurnal variation of net radiation minus ground heat flux is approximately the same in all cases. It is found that the inland penetration rate of the sea breeze varies significantly with the degree of soil moisture. The model predicts a significant slowing of the frontal advance around midday for the case of ‘relatively weak’ sensible heating over the land, as well as reproducing the frontal acceleration observed in late afternoon for all cases. The sea-breeze circulation detaches itself from the coastline around sunset and moves rapidly inland with diminishing magnitude and this aspect is discussed in relation to observations in the south of England.
An attempt is made to model the southern England sea breeze of 14 June 1973. Various experiments are discussed, including one in which different values of Bowen ratio are specified ahead of and behind the front. Fairly good agreement is found, although it is not possible to reproduce all features of the inland penetration curve for that day.
Some implications of these experiments for the production of daily forecasts by mesoscale models are briefly discussed.