Climate

Chinese Annals and Traditional Proxies Reveal Volcanic Monsoon Influence

Volcanic eruptions are generally considered one of the best-understood (and most dramatic) causes of sudden climate changes, with large explosive eruptions capable of causing severe short-term cooling on hemispheric and global scales. This mainly occurs when eruptions inject large volumes of sulfur dioxide into the high atmosphere, where the gas oxidizes to form an aerosol particle haze that reflects incoming solar radiation to space, cooling the…

Global Warming Slows, But Only On the Surface

Global surface temperatures, which rose steadily during the end of the 20th century, have by some measures ceased to climb during the early 21st century. Since carbon dioxide emissions have certainly not decreased during this period, climate science detractors have held this as evidence that global warming is neither caused by human activities nor worth worrying about. A new study by Chen and…

Climate Impacts on Sanitation in Botswana

Worldwide, about 800 million people lack access to an improved water source. In its most basic form, an improved water supply is a well or protected spring that protects water from outside contamination. Lack of access to clean water helps explain why15% of all deaths of children under 5 worldwide are caused by diarrheal diseases. While many factors are involved, water quality and quantity…

Dendrochronology's "Divergence Problem" Explained?

A new study by Alexander Stine and Peter Huybers offers strong evidence that reduced light availability (“global dimming”) explains the apparent lack of tree-ring evidence in many Arctic regions for the recent warming observed in instrumental records there. Dendroclimatology uses measurements of the yearly growth width and density of tree rings to reconstruct changes in past climate. The …

Studying the ecological roles of top predators and the impacts of climate change on predator-prey interactions and ecosystem dynamics

I study the effects of climate change on animals, the interactions they have with each other and plants, and the cascading impacts of climate change on humans and how we live. This research is important because the climate is changing rapidly and we need to understand how ecosystems will respond so that we can adapt to the new realities of a warming world.

Dan Czizco, Program in Atmospheres, Oceans and Climate

Dan Cziczo will speak about his work as an atmospheric scientist interested in the interrelationship of particulate matter and cloud formation. His research utilizes laboratory and field studies to elucidate how small particles interact with water vapor to form droplets and ice crystals which are important players in the Earth’s climate system. Experiments include using small cloud chambers in the laboratory to mimic atmospheric conditions that lead to cloud formation and observing clouds in situ from remote mountaintop sites or through the use of research aircraft.

Excessive Winter Deaths. Don't Expect Reductions From Global Warming

A presumed benefit of global warming is the assumption that warmer winter temperatures might decrease excessive winter deaths (EWDs) common in temperate climates. EWDs are defined as the difference between the number of deaths in a region during winter months (December – March) and the average of the proceeding fall and subsequent spring deaths. EWDs are attributable to a number of factors including higher incidences of cardio-respiratory and infectious diseases along with colder temperatures and icy conditions that can cause hypothermia and accidental falls.

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