Overview of surface to near-surface atmospheric profiles over selected domain during the QWeCI project
Overview of surface to near-surface atmospheric profiles over selected domain during the QWeCI project
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QWeCI 项目期间选定区域的地表到近地表大气剖面概述
DOI：
10.1007/s00703-018-0618-1
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发表时间：
2018
影响因子：
2
通讯作者：
Aryee J
中科院分区：
文献类型：
--
作者：
Aryee J
评估地表到近地表大气通量的演变是提高我们对它们相互作用的理解的关键，同时进一步推进气候应用。本文概述了一些地面到近地面大气通量的日变化到季节变化，以及它们之间的相互作用。在两个不同地点测量的上升流和下降流辐射通量（，）、土壤热通量（）、相对湿度（RH）、降雨量（RR）和地面气温（T（Owabi和KNUST），时间分辨率为10分钟，包括量化天气和气候影响（QWeCI）项目期（2011-2013），被用来评估它们的关系在昼夜到季节尺度。首先，进行各种配置文件的昼夜评估。这些提供了相对活跃的白天的信息，地球表面暴露于大量的，启动上升和下沉的热气流，随后增加了Tand，RH减少，直到中午后几个小时，超过这一逆转观察。此外，从植被地形（Owabi）被发现在白天被引导到表面，并在夜间从次表层释放回大气中，补偿能量损失从表面。此外，这两个地区的降雨（RR）一般都是对流性的，大多发生在格林尼治标准时间1500到2300之间。净辐射（）和相对湿度（RR）之间的关系目前在统计学上尚不清楚，尽管已发现降雨峰值出现在较低和相对较暖的温度，伴随着较高的相对湿度。此后，进行季节性评估，以捕捉每月平均的日变化的测量表面近表面参数。这表明白天T升高，加上相对较低的RH在旱季，和更多的减少在季风季节的配置文件。此外，还使用ERA-5数据集进行了全国范围的评估，这些数据集与现场数据相似。然而，在ERA-5中，该区域上空的对流降雨并没有完全解决。尽管如此，这项研究的结果对于了解热带潮湿气候中的地表能量平衡过程至关重要，这对于该地区的各种气候影响建模应用和政策制定非常重要。
Assessing the evolution of surface to near-surface atmospheric fluxes is key to improving our understanding of their interactions, while further advancing climate applications. In this paper, an overview of the diurnal to seasonal evolution of some surface to near-surface atmospheric fluxes, coupled with their interactions, have been provided. Fluxes of downwelling and upwelling radiation (,,,), soil heat flux (), relative humidity (RH), rainfall (RR) and surface air temperature (T), measured from two different locations (Owabi and KNUST) and at a temporal resolution of 10 min, encompassing the quantifying weather and climate impact (QWeCI) Project period (2011–2013), were used to assess their relationship on diurnal to seasonal scales. First, diurnal assessments of the various profiles were performed. These provided information on the relatively active daytime, with the earth surface exposed to substantial, initiating rising and sinking thermals which subsequently increasedTand, with reductions inRHuntil few hours after midday, beyond which a reversal was observed. Also,from the vegetative terrain (Owabi) was found to be directed into the surface at daytime, and released from the sub-surface layer back into the atmosphere at night time, compensating the energy loss byfrom the surface. Furthermore, rainfall (RR) in both locations were found to be generally convective and occurring mostly between 1500 GMT and 2300 GMT. The relationship between net radiation () andRRis presently statistically unclear, although rainfall peaks were found to be occurring at lowand relatively warmerT, accompanied by highRH. Thereafter, seasonal assessments were performed to capture the monthly-averaged diurnal variabilities in the measured surface to near-surface parameters. These showed heightened daytimeT,and, coupled with relatively lowRHwithin the dry seasons, and more reduced profiles within the monsoon season. Additionally, countrywide assessments were performed using ERA-5 datasets which showed similarities with the in situ data. However, convective rains over the domain were not fully resolved in ERA-5. Nonetheless, the findings of this study are essential to understanding surface energy balance processes in tropical, humid climates, which is important for various climate-impact modeling applications and policy formulations over the region.
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DOI：
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发表时间：
2017
期刊：
影响因子：
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作者：
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DOI：
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发表时间：
2016
期刊：
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作者：
C. Mensah;L. Amekudzi;N. Klutse;J. N. Aryee;K. Asare
通讯作者：
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DOI：
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发表时间：
1976
期刊：
影响因子：
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作者：
C. J. Moore
通讯作者：
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DOI：
10.1002/joc.5238
发表时间：
2018-03-15
期刊：
INTERNATIONAL JOURNAL OF CLIMATOLOGY
影响因子：
--
作者：
Aryee, J. N. A.;Amekudzi, L. K.;Yorke, C.
通讯作者：
Yorke, C.