Abstract The summer daily maximum temperature ( T max ) over South China features obvious quasi‐biweekly oscillation (QBWO) and its QBWO sources mainly include three types. first type is influenced by tropical mid–high‐latitude antiphase coupling QBWO. Successive suppressed enhanced convection, accompanying with anticyclonic cyclonic anomalies, propagate northward from the northwest of Philippi...

1. introduction long-term climatic data are a prerequisite for hydro-meteorological studies and understanding of past climate. iran is mostly located in semi-arid to arid climate zones, so information on the natural long-term variability of the hydroclimate is of great relevance for land use planning, agriculture, and water supply of a growing population. however, the maximum length of recorded...

the occurrence of dust storms and their sources in the southern and central parts of iran during the period of 2002 to 2009 was investigated. for this purpose, the meteorological and synoptic data, data from the middle and upper atmosphere, and wind flow tracking model were used. dust storms and nddi were traced using satellite imagery from fasa, shiraz, and bushehr stations. analysis of the gr...

background : phlebotomus sergenti s.l. is considered the most likely vector of leishmania tropica in iran. although two morphotypes- p. sergenti sergenti (a) and p. sergenti similis (b)-have been formally described, further morphologi­cal and a molecular analysis of mitochondrial cytochrome oxidase i (mtdna-coi) gene revealed inconsistencies and suggests that the variation between the morphotyp...

background : the age standardized incidence rates of esophageal cancer in women and men in iran have the fifth and eighth ranks, respectively. due to the high incidence rate of esophageal cancer and the necessity of knowledge of its geographical distribution, the incidence of this cancer was mapped at province and county levels in the present study. methods: the study population of this empiric...

A delay in autumn sea ice formation is an important consequence of Arctic Amplification. Baffin Bay one such region impacted by delayed formation, though spatiotemporal analyses to date have not detailed the evolution and drivers changes. In this study, we document abrupt cover changes key transition month October from 1950 2021. The mean variance dramatically change 2001 onward with a largely ...

In the face of shocks, a region’s economic resilience decides whether it can quickly recover or slip into long-term stagnation. This study took 2801 counties in China as research object and distinguished them short-term by taking 2007–2020 time period, used spatial autocorrelation, semi-variance function, geodetector method to analyze evolution pattern driving mechanism China’s different period...

Abstract The study evaluates the surface water quality of Bach Dang river basin. During rainy season, temperature, pH, EC, BOD5, COD, coliforms, ammonium and phosphate values were 27–37 oC, 6.6–8.9, 300–2200 μS/cm, 5–25 mg/L, 5–26 0–3000 MPN/100mL, below 0.01 0.02 respective. dry seasons, Zn, Pb, Cr, As, Fe Mn levels drinking limits. In index varied from 76 to 91, signifying medium excellent qu...

Land use change can impact the land surface radiation budget and energy balance by changing biophysical processes. Based on satellite remote sensing data from 2000 to 2015, we quantitatively estimated radiative forcing induced cropland expansion during early 21st century in northern China. The results showed that heat flux atmosphere due was quite variable different climate zones. increased hum...