Planting trees is widely championed as a straightforward, nature-based fix for global warming. The logic seems foolproof: expanding forests should pull more carbon dioxide from the air and pack it safely into the earth. However, a sweeping five-decade analysis of land transformation in Kerala, India, suggests the reality beneath the surface is full of unexpected trade-offs.

Published in the journal Carbon Research, the study was spearheaded by corresponding author V. K. Dadhwal at the School of Natural Sciences & Engineering, National Institute of Advanced Studies in Bengaluru. His team utilized advanced machine learning to map how half a century of plantation expansion actually impacted the dirt itself. Their findings challenge a popular assumption, proving that massive afforestation campaigns do not automatically equal a massive boost in soil organic carbon (SOC).

To accurately track the landscape from 1972 to 2020, the research team moved beyond traditional area-based counting. They fed a Random Forest predictive model with detailed historical land use maps, legacy soil measurements, local climate data, and topographic variables. This high-resolution approach allowed them to pinpoint specific geographical hotspots where carbon was either successfully sequestered or silently lost.

Extreme climate impacts on people and the environment are often associated with very high levels of global warming (3 or 4°C). A new study led by the Helmholtz Centre for Environmental Research (UFZ) shows that this assumption is too simplistic. Even moderate warming of 2°C could pose considerable climate risks for sectors that are particularly important for society and ecosystems. These include densely populated regions facing heavy rainfall, key agricultural areas affected by droughts, and forests exposed to extreme fire weather conditions. This underlines the urgency of rapid climate mitigation measures to limit these risks. The study has been published in Nature.

Mount Sinai-led research shows significantly more cardiac mortality occurs during cooler temperatures than in excessive heat

Around the world, nearly every delta can adapt to rising sea levels using today’s technological capabilities, materials, and space, according to physical geographers from Utrecht University. In a new study - the first global assessment of the physical solution space of global deltas - they studied nearly 800 deltas, representing ~96% of the global delta land area and home to roughly 350 million people, to determine their opportunities for sea-level rise adaptation.

Rising temperatures are threatening dung beetle populations in the Amazon. The example shows a trend that could bring many insect species there to their heat threshold. Researchers from Würzburg and Bremen conducted the study.