Long-term remote sensing normalized difference vegetation index (NDVI) datasets have been widely used in monitoring changes. In this study, the NASA Global Inventory Modeling and Mapping Studies (GIMMS) NDVI3g dataset was as data source, dimidiate pixel model, intensity analysis, residual analysis were to analyze changes of coverage Inner Mongolia—from 1982 2010—and their relationships with climate human activities. This study also explored Mongolia respect natural factors The results showed...

Effective estimation of crop yields at a regional scale holds significant importance in facilitating decision-making within the agricultural sector, thereby ensuring grain security. However, traditional ground-based measurement techniques suffer from inefficiencies, and there exists need for reliable, precise, effective method estimating rice yields. In this study, we employed four machine-learning techniques: partial least squares regression (PLSR), support vector (SVR), random forest...

Reservoirs play an important role in living water supply and irrigation of farmlands, thus the quality is closely related to public health. However, studies regarding human health ecological risk assessment polycyclic aromatic hydrocarbons (PAHs) waters reservoirs are very few. In this study, Shitou Koumen Reservoir which supplies drinking 8 million people was investigated. Sixteen priority PAHs were analyzed a total 12 samples. terms individual PAHs, average concentration Fla, 5.66 × 10−1...

Abstract Heat stress is projected to intensify with global warming, causing significant socioeconomic impacts and threatening human health. Wet-bulb temperature (WBT), which combines humidity effects, a useful indicator for assessing regional heat variability trends. However, the variations of European WBT their underlying mechanisms remain unclear. Using observations reanalysis datasets, we demonstrate remarkable warming summer during period 1958–2021 over Europe. Specifically, has...

Amidst unprecedented rising global temperatures, this study investigates the historical context of heatwave (HW) events in Eastern Europe. The record-breaking 2023 summer, featuring a HW lasting for 19 days south-eastern part Romania, extending up to Ukraine, necessitates deeper understanding past extreme events. Utilizing statistical methods on long-term station data spanning from 1885 2023, we aim detect and analyze HWs, particularly focusing predating 1960. This extended timeframe allows...

As the climate warms, interacting weather extremes such as sequential heat events pose complex risks to societies. Regarding global food system, laboratory experiments suggest that crop exposure spring may either confer tolerance or enhance vulnerability subsequent summer events. We show, under historic conditions hot springs benefit yield but amplify impacts of by 3% 36% across crops and regions compared average conditions. This increasing sensitivity results in outweighing benefits when...

Heat stress is projected to intensify with global warming, causing significant socioeconomic impacts and threatening human health. Wet-bulb temperature (WBT), which combines humidity effects, a useful indicator for assessing regional heat variability trends. However, the variations of European WBT their underlying mechanisms remain unclear. Using observations reanalysis datasets, we demonstrate remarkable warming summer during period 1958-2021 over Europe. We find that increase in driven by...

This research is based on the standardized precipitation evapotranspiration index (SPEI) and normalized difference vegetation (NDVI) which represent drought condition land. Take linear regression method Pearson correlation analysis to study spatial temporal evolution of SPEI NDVI effect vegetation. The results show that (1) during 1961–2015, values at different time scales showed a downward trend; SPEI‐12 has mutation in 1997 value significantly decreased after this year. (2) During...

This work was to investigate distribution characteristics, human health risk assessment, and possible sources of 16 priority polycyclic aromatic hydrocarbons (PAHs) in corn surface soils farmlands along main roadside Changchun City, Jilin Province, China. Total concentrations PAHs ranged from 1572.4 4390.2 µg/kg with a mean value 2954.9 219.9 627 362µg/kg corn. Light-molecular-weight (2–3 rings) concentration dominant soils, accounting for 51%, whereas high-molecular-weight (5–6 highest...

Abstract. Amidst unprecedented rising global temperatures, this study investigates the historical context of heat wave (HW) events in Eastern Europe. The record-breaking 2023 summer, featuring a HW lasting for 19 d southeastern part Romania, extending up to Ukraine, necessitates deeper understanding past extreme events. Utilizing statistical methods on long-term station data spanning from 1885 2023, we aim detect and analyze HWs, particularly focusing predating 1960. This extended time frame...

The atmospheric circulation is driven by heat transport from the tropics to polar regions, embedding energy conversions between available potential and kinetic through various mechanisms. processes of transformations related dynamics atmosphere can be quantitatively investigated Lorenz cycle formalism. Here we examine these variations impacts modes climate variability on using reanalysis data Japanese Meteorological Agency (JRA-55). We show that overall becoming more energetic efficient. For...

Reference evapotranspiration (ET0) plays an important role in regional dry/wet conditions. Based on the Food and Agriculture Organization of United (FAO) Penman-Monteith method daily climate variables, ET0 was calculated for 21 stations around Songnen Grassland, northeast China, during 1960–2014. The temporal spatial variations precipitation (P) were analyzed annual, seasonal, growing season (from April to October) time series using Mann-Kendall test, Sen’s slope estimator, linear regression...

Although reservoirs in China are of great significance, very few studies on risk assessment have been reported for reservoirs. This study investigated distribution characteristics, cancer and ecological risks, source diagnosis 16 priority polycyclic aromatic hydrocarbons (PAHs) sediments from Shitou Koumen Reservoir Jilin Province, China. A total 12 sediment samples were collected the reservoir August (wet season) 2014. Total PAH concentrations ranged 1294.51 ng/g to 2755.35 with a mean...

Abstract European heat waves result from large-scale stationary and have major impacts on the economy mortality. However, dynamical processes leading to maintaining are still not well understood. Here we use a nonlinear wave model (NSWM) examine role played by anomalous how they forced during waves. For our study, Japanese Reanalysis (JRA-55) data for period 1958 through 2017. We show that NSWM can successfully reproduce main features of observed in upper troposphere. Our results indicate...

Climate change is increasing the intensity, frequency, and persistence of droughts, as observed by recent record-breaking events in Europe. Two factors contribute to this intensification: dynamic changes —changes likelihood weather patterns— thermodynamic changes. While former are uncertain future climate projections, latter characterized a high signal-to-noise ratio, there robust ubiquitous rise land-surface temperatures.To better analyze contributions these factors, we...

The key locations of freshwater input driving Atlantic Meridional Overturning Circulation (AMOC) slowdown and their climate responses remain inconclusive. Using a state-of-the-art global model, we conduct hosing experiments to reexamine AMOC sensitivity its impacts. Irminger basin emerges as the most effective region for additional fluxes, causing greatest weakening. While temperature precipitation are relatively homogeneous, subcontinental responses—especially in northern mid-latitudes—are...

Abstract Although summer insolation decreased continuously throughout the Holocene, geological evidence suggests that precipitation over North and South China exhibited out‐of‐phase variations before middle followed by in‐phase afterward. This proxy‐based altered relationship between East Asian is also obvious in an accelerated transient Holocene experiment. The simulation indicates monsoon strength directly responds to change, failing explain varying insolation‐precipitation relationship....

Reference evapotranspiration (ET0) plays an irreplaceable role in regional dry/wet conditions under the background of climate change. Based on FAO Penman-Monteith method and daily variables, ET0 was calculated for 22 stations around Songnen Grassland, northeast China, during 1960-2014. The temporal spatial variations precipitation (P) were comprehensively analyzed at different time scales by using Mann-Kendall test, Sen’s slope estimator, linear regression coupling with break trend...

Spectral characteristics of optically active constituents (OACs) in waters are key parameters biooptical modeling.Comparative analyses about the differences optical and composition between riverine reservoir second Songhuajiang River tributaries were conducted, infl uencing factors impacting on chromophoric dissolved organic matter (CDOM) carbon (DOC) examined based absorption properties.Dissolved total suspended (TSM) signifi cantly higher waters, chlorophyll-a (Chl-a) was opposite.The...