From glacier ice, a wealth of scientific data

Perched next to a river near a glacier's edge in Greenland, Penn biogeochemist Jon Hawkings and Jack Murphy, senior research coordinator in Hawkings' lab, scooped up samples of frigid meltwater, careful to seal the bottles ...

Tracking the deuterium in raindrops, one molecule at a time

New research led by the University of Massachusetts Amherst refines our understanding of the chemical traces that act as the rain's fingerprint. The work, which appeared recently in Global Biogeochemical Cycles, is crucial ...

Tracing anthropogenically emitted carbon dioxide into the ocean

Through fossil fuel combustion, deforestation, and other industrial and agricultural activities, humans have raised global atmospheric carbon dioxide (CO2) levels to more than 415 parts per million. That concentration represents ...

Tropical wetlands emit more methane than previously thought

Since 2007, the world's atmospheric methane concentration has risen at an accelerated rate, but scientists aren't exactly sure why. This is a problem, because methane is a particularly potent greenhouse gas. It has more than ...

Understanding the calcium carbonate cycle in the North Pacific

Organic carbon and calcium carbonate are two critical components of the ocean's carbon cycle. Organic carbon originates mainly from phytoplankton photosynthesis, which is part of a complex biological pump. Calcium carbonate, ...

The seasonality of oceanic carbon cycling

The ebb and flow of carbon within Earth's systems are complex and ever-moving occurrences. Carbon is a nomadic element, traveling between the atmosphere, ocean, and the soil, rock, and ice of the planet, changing forms along ...

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