Heat and drought stress, which often occur together, are the main environmental factors limiting survival growth of vegetation. Studies on response gross primary production (GPP) to extreme climate events such as heat highly significant for identification ecologically vulnerable regions, ecological risk assessments, protection. We got 1982–2017 climatic data from University East Anglia Climatic...

Understanding how drought is impacted by both natural and human influences crucial to the sustainable utilization protection of water resources. We established a severity index (DSI) based on terrestrial storage anomaly (TWSA) derived from GRACE satellite detect characteristics trends over ten major river basins in China 2002 2017. The influence factors (terrestrial components, precipitation, e...

The n × n Brualdi-Li matrix Bn has recently been shown to have maximal Perron value (spectral radius) ρ among all tournament matrices of even order n, thus settling the conjecture by the same name. This renews our interest in estimating ρ and motivates us to study the Perron eigenvector x of Bn, which is normalized to have 1-norm equal to one. It follows that x minimizes the 2-norm among all Pe...

Globally, the seasonal snow cover is areal largest, most short-lived and variable part of cryosphere. Remote sensing proved to be a reliable tool investigate their short-term variations worldwide. The medium-resolution sensor MODIS has been delivering daily products since year 2000. Remaining data gaps due cloud coverage or polar night are interpolated using DLR’s Global SnowPack (GSP) processo...

In a greening Arctic, Iceland stands out as an area with very high increases in the AVHRR Normalized Difference Vegetation Index (NDVI, 1982–2010). We investigated the possible sources of this anomalous greening in Iceland’s dynamic landscape, analyzing changes due to volcanism and warming temperatures, and the effects of agricultural and industrial land use changes. The analysis showed the inc...

In this paper, we study the evolution of agricultural product specialisation at farm and county level from 1979 to 1997 in Spain, thus covering all the stages of the gradual implementation of the Common Agricultural Policy. We use a multiproduct version of Theil and Finizza's index of segregation that allows us to decompose farm product specialisation into county specialisation with respect to ...