![]() Is controlled largely by a diurnal cycle due to the thermal heat contrastīetween water surface and land surface in the tropics (e.g. Variability in hourly rainfall is also dominant over south-eastern Africa. Such as Tanzania, Mozambique, Madagascar, and Malawi, where their economies This monsoon-brought precipitation is very importantįor the regional economy and society of the south-eastern African nations South-east of Africa (November to March, as shown in Fig. S1n), bringing a wet Conversely, the south-westward Indian winter monsoon generates a largeĬonvergence of vertically integrated moisture flux over the tropical Segele et al.,Ģ009a Viste and Sorteberg, 2013 Gleixner et al., 2017 Bohlinger et al.,Ģ017). Precipitation over north-eastern Africa and South Asia (e.g. The north-eastward moisture flux provides some of the summer Moisture flux divergence (Fig. S1m) and, consequently, a dry season falls on (May to September), tropical south-eastern Africa is covered entirely with a Camberlin, 1997 Viste and Sorteberg, 2013 Jury, 2016 DialloĮt al., 2018 Koseki and Bhatt, 2018) as shown in Fig. S1a–l in the Supplement. Is associated with the south-westerly Indian summer and north-easterly winter Manifestation of dry and wet seasons induced by the meridional march of the Surface moisture flux divergence/convergence over the lake and surroundingĪrea which contributes to the diurnal cycle of precipitation in this region.Ī key climatological characteristic of tropical south-eastern Africa is the Vapour enriched by Lake Malawi drive primarily a diurnal variation in the Lake breeze generates the intense divergence over the lake and precipitation Nocturnal lakeward land breeze generates surface convergence effectively and Lake Malawi also enhances the lake–land breeze circulation the This is most evident over the lake and surrounding coastal Variations in precipitation are substantially amplified by the presence of Simulation in which Lake Malawi is removed reveal that the diurnal Comparisons between the benchmark simulation and an idealized Precipitation around the lake is associated with the lake–land breezeĬirculation. Harmonic and principle component analyses: the precipitation is intenseĭuring midnight to morning over Lake Malawi and the precipitation peaks in Model, the well-defined diurnal cycle is detected around Lake Malawi with Using a state-of-the-art satellite product and regional atmospheric Information for water resource management in tropical south-eastern African ![]() Vary around Lake Malawi on a diurnal timescale, which can be valuable Now that we’ve learned about some of the effects that natural features have on winds, on Thursday, we’ll take a look at some of the special wind types, due to these features across the U.S.We investigate how the intensity and spatial distribution of precipitation Hikers, climbers and those who live in the mountains know this very well. When upslope winds (valley breezes) are fully developed and have enough moisture, they build cumulus clouds over the mountains and showers and even thunderstorms form during the early afternoon or the warmest part of the day. This type of wind flow is best developed in clear Summer weather where the winds are light. At night, the wind reverses and the air is cooler and more dense, thus it sinks. During the day, the sun heats the walls of a valley and that warm air begins to rise up the side of the mountains, thus this is known as a valley breeze. This is why we so frequently have a 20 to 30 percent chance of rain on any given Summer day due to the sea breeze.įor those residents of mountainous regions, their weather is affected by mountain and valley breezes. Where the sea breeze front meets the drier, hotter inland air, the warmer, lighter air will converge and rise and develop thunderstorms. Cities along the coast usually experience the sea breeze by noon, thus cities along the coast experience their high temperatures earlier than inland cities. The temperatures behind the sea breeze front can be up to 10 degrees cooler than ahead of it during the first few hours. The leading edge of the sea breeze is called the sea breeze front. At night, the land cools more quickly than the water and the opposite happens and we get what we call a land breeze or offshore flow. Usually the breezes are strongest right at the shore and diminish further inland. ![]() ![]() Winds like to blow toward an area of low pressure, so we see the wind blowing toward the coast or onshore and we call this the sea breeze or lake breeze. The air over the water remains cooler, so a small area of high pressure exists over the water. During the day, the land heats up more quickly than the water and the air above the land creates a small area of low pressure. The uneven heating of water causes small scale coastal winds. ![]() Let’s start with a brief introduction to land and sea breezes. ![]()
0 Comments
Leave a Reply. |