This discussion of the problem of depopulation in Melanesia limits itself to oudine form and brief treatment. Moreover, it is unwise to be dogmatic about the relative importance of the factors invQlved. Depopulation, wherever it occurs, is a phenomenon of complex derivation and of wide societal relationships, which vary accQrding to locus and are in some cases evanescent. The problem is one tha...

The introduction and rapid spread of Drosophila subobscura in the New World two decades ago provide an opportunity to determine the predictability and rate of evolution of a geographic cline. In ancestral Old World populations, wing length increases clinally with latitude. In North American populations, no wing length cline was detected one decade after the introduction. After two decades, howe...

Tropical cyclones (TC) are extreme weather conditions caused by severe circular storms that originate in warm oceans. They strong destructive forces cause disastrous effects on human life and property, lead to economic damage. Therefore, it is necessary forecast the TC intensity avoid issues. This study proposes a using Long-Short Term Memory (LSTM) with Cat Swarm Optimization (CSO). The LSTM m...

On May 31, 2020 a short-lived convective storm appeared in one of the small cyclones Jupiter's South Temperate Belt (STB) at planetographic latitude 30.8°S. The outbreak was captured by amateur astronomer Clyde Foster methane-band images, became widely known as Clyde's Spot, and imaged very high resolution Junocam instrument on board Juno mission 2.5 days later. images showed white two-lobed cy...

Abstract. Atmospheric blocking can influence Arctic weather by diverting the mean westerly flow and steering cyclones polewards, bringing warm, moist air to high latitudes. Recent studies have shown that diabatic heating processes in ascending warm conveyor belt branch of extratropical are relevant dynamics. This leads question extent which associated with mid-latitude may high-latitude drive e...

Objectively derived resolution-dependent criteria are defined for the detection of tropical cyclones in model simulations and observationally based analyses. These criteria are derived from the wind profiles of observed tropical cyclones, averaged at various resolutions. Both an analytical wind profile model and two-dimensional observed wind analyses are used. The results show that the threshol...

Impact of three different cyclones on the Bay of Bengal water and its surface chlorophyll concentration has been studied in three different zones during October-December 2000 using 24 scenes of IRS-P4 Ocean Color Monitor (OCM). The chlorophyll concentration found to be increasing up to 5.0 mg/m with effect of cyclones and hurricanes. The data has been correlated with Sea Surface Temperature (SS...

Tropical cyclones spend most of their life cycle over the tropical and subtropical oceans. Because of the lack of in situ data in these regions, satellite observations are fundamental for tracking and estimating the intensity of these storms for real-time forecasting and monitoring climate trends. This chapter reviews methods for estimating tropical cyclone intensity from satellites, including ...