Abstract. The US agriculture system supplies more than one-third of globally traded soybean, and with 90 % soybean produced under rainfed agriculture, trade is particularly sensitive to weather climate variability. Average growing season conditions can explain about yield Additionally, crops be specific short-term extremes, occurring in isolation or compounding at key moments throughout crop de...

Abstract Compound hot–dry events—co-occurring hot and dry extremes—frequently cause damages to human natural systems, often exceeding separate impacts from heatwaves droughts. Strong increases in the occurrence of these events are projected with warming, but associated uncertainties remain large poorly understood. Here, using climate model ensembles, we show that mean precipitation trends exclu...

Mean concentrations of PAHs, PCBs, and DDT in mollusks and sediments at sites in the National Status and Trends Program (NST) are distributed in log-normal fashion. The dry weight-based chlorinated organic concentrations in mollusks generally exceed those in nearby sediments by an order of magnitude. PAHs are found at similar concentrations in sediments and mollusks. Highest concentrations of P...

There are only five mediterranean-climate regions (MCRs) on Earth – the Mediterranean Basin, most of California, central Chile, southern South Africa, and south-central and south-western Australia. They all have cool, or cold, and relatively wet winters alternating with long, hot, and dry summers. Spring and autumn seasons are ephemeral in comparison, and highly variable. During much of the yea...

The remains of the natural and human activities in some parts of the earth register as geopark. Actually, geopark is one or more geological phenomenon which is important from ecology, history, culture and archeological view. The aim of the geotourism description in an area and creating a geopark is trying to keep the earth's inheritance and locality the economic of the area. Iran with an old hi...