Surface Thermodynamic Gradients Associated with Gulf of Mexico Sea-Breeze Fronts

Surface Thermodynamic Gradients Associated with Gulf of Mexico Sea-Breeze Fronts
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与墨西哥湾海风锋相关的表面热力学梯度

DOI:
10.1155/2018/2601346
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发表时间:
2018
影响因子:
2.9
通讯作者:
Koziara, Michael
Koziara, Michael
中科院分区:
地球科学4区
文献类型:
--
作者:
White, Loren D.;Koziara, Michael

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高空间/时间分辨率的移动的样带被用来检查2014年8月和2015年8月期间密西西比海岸沿着海风锋(SBF)的热量和水分结构。与大多数类似的研究相比,条件更加温暖和潮湿。结果显示,在整个成熟SBF区,混合比增加了1 - 2 g/kg,温度降低了2.5°C。当SBF雷达细线可识别时,它们的位置与地表热力学变化非常吻合。虽然海岸的温度较低,但在SBF附近注意到热量,水分和辐射特征的位置的微尺度偏移,特别是当海风系统相对较弱或不成熟时。有时,强烈的太阳辐射似乎会导致运动学SBF后面的过渡区内的温度暂时上升。这些结果与大多数其他诊断研究不同。一些热力学的变化,注意到在海洋空气质量连接到小水体,如比洛西湾。还注意到SBF通过至少暂时增加人体热应激的可能性,如热指数所述。
High spatial/temporal resolution mobile transects were used to examine the thermal and moisture structure of the sea‐breeze front (SBF) along the Mississippi coast during August 2014 and 2015. Compared to most similar studies, conditions were much warmer and more humid. Results show a 1‐2 g/kg increase in mixing ratio across the mature SBF zone, and up to a 2.5°C temperature decrease. When SBF radar fine lines are identifiable, their position agrees very well with surface thermodynamic changes. Although temperatures were cooler at the coast, microscale offsets in location of thermal, moisture, and radiative features are noted in the vicinity of the SBF, particularly when the sea‐breeze system is relatively weak or immature. At times, it seems that strong solar insolation causes the temperature to rise temporarily within the transition zone behind the kinematic SBF. These results are at variance with most other diagnostic studies. Some thermodynamic variations are noted within the marine air mass in connection to minor water bodies such as Biloxi Bay. The potential for passage of the SBF to at least temporarily increase human heat stress as described by heat index is also noted.
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