The ability of receptor models to estimate regional contributions to fine particulate matter (PM2.5) was assessed with synthetic, speciated datasets at Brigantine National Wildlife Refuge (BRIG) in New Jersey and Great Smoky Mountains National Park (GRSM) in Tennessee. Synthetic PM2.5 chemical concentrations were generated for the summer of 2002 using the Community Multiscale Air Quality (CMAQ)...

Fall armyworm, Spodoptera frugiperda (J.E. Smith), is a highly mobile insect pest of a wide range of host crops. However, this pest of tropical origin cannot survive extended periods of freezing temperature but must migrate northward each spring if it is to re-infest cropping areas in temperate regions. The northward limit of the winter-breeding region for North America extends to southern regi...

A total of 71 air samples were collected in Hong Kong area from November 2001 to February 2003 using a highvolume air sampler and a high-volume cascade impactor with five atmospheric pressure stages. The Be radioactivity on each stage was measured using a high-efficiency germanium gamma-ray spectrometer. From the radioactivity of stages, the total airborne Be radioactivity was determined. The a...

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...

The present study focuses on the investigation of both near-surface and vertical variability carbon monoxide (CO) concentrations their potential sources obtained from in situ satellite Measurements Pollution Troposphere (MOPITT) over a semiarid region (Anantapur, India) January 2016 to December 2017. diurnal variation CO shows sharp morning (07:00-09:00 LT) evening peaks associated local anthro...

The oriental armyworm Mythimna separata (Walker) is a worldwide migratory pest that threatens food security in China. Previous studies have clarified the general migration regularity of M. East Asia, but knowledge routes over northeast China, especially autumn as well impact by climate change recent years, still limited. From 2017 to 2020, we monitored China searchlight traps and simulated moth...

Abstract The Precipitations conditions having special attention in the last decade due to their impact on human health, ecosystems and other aspects such as agriculture, hydrology. ECMWF ERA-Interim 15-hourly (00 15 UTC) total precipitations a 1° x grid covering Iraq, from 29° N 38° 39° W 48° E, with of 10 by cells, was used. At each point, extremes were defined those events which above 90 th p...

Drying lakes have become a new source of dust, causing severe problems in surrounding areas. From 2000 to 2017, statistical study was conducted on Lake Urmia Iran the Middle East. The results indicated significant increase annual number dusty days stations around lake and mean aerosol optical depth (AOD) at 550 nm. sharp decrease snowfall rate over area since 2007 has been linked lake’s decreas...