Climate Change

formerly “Climate Science” this has been updated in recognition of the fact that ALL of our articles, events, etc. involve climate sciience.  ”Climate change” is intended to suggest changing elements of the climate: e.g., shifts in global oceanic and atmospheric circulation and ensuing changes to temperature, precipitation, groundwater levels, saltwater intrusion.

South Australia Drought Attributed to Climate Change

Recent precipitation declines over the poleward and western margins of subtropical dry zones from North America to Australia are consistent with a reorganization of atmospheric dynamics attributable to global warming. But are these droughts attributable to anthropogenic forcings like increased GHG, aerosols and ozone, or are they within the realm of natural variability?  The answer is not always clear. In the case of California…

North Atlantic Warming and the Retreat of Greenland's Glaciers. Fiamma Straneo

Models do ‘okay’ at predicting changes in surface mass balance of Greenland’™s ice sheets, says Fiamma Straneo. They don’t do so well, and therefore are not very useful, when it comes to predicting the accelerated melting that is now occurring and which, she says, now accounts for about one-fourth of global sea level rise. In this presentation she reviews her studies of what is happening in that dynamic space at the edge of the ice sheets where atmosphere, ocean and glacier all come together, and the various mechanisms proposed as contributing to ice sheet loss.

What Precise Source Tells Us About Arctic Sea Ice. Dennis Darby

Sedimentation rates in parts of the Arctic Ocean are surprisingly high with 1-2% of that sediment originating from ‘dirty ice,’ says Professor Emeritus Dennis Darby. He explains various processes that govern the formation of sea ice and how sediment can be entrained in it, the processes and routes by which ‘dirty ice’ is transported throughout the Arctic, and his data base of 38,000 different samples permits tracking sediment collected from the sea floor back to its point of origin.

Rapid Arctic Warming and Changing Mid-Latiitude Weather: Is there a connection? Jennifer Francis

The workshop’s first presentation was a status report on arctic climate from Dr. Jennifer Francis. In the past 30 years, she says, aerial coverage of sea ice has been reduced by half. Ice volume had declined 70% over the same period. She offers a novel hypothesis that Arctic amplification “regional warming in excess of the global average” causes the jet stream to slacken producing meanders that ‘lock in’ and cause aberrant weather for prolonged periods of time. Satellite imagery and this past winter’s ‘polar vortex’ and extended drought in the W.

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 …

Belowground biotic interactions and how they respond to, and influence climate change via climate-ecosystem carbon feedbacks.

My research interests include soil, ecosystem and climate change ecology. Specifically, my work focuses on biotic interactions and how they respond to, and influence climate change via climate-ecosystem carbon feedbacks. My PhD work, conducted at Cardiff University, centered on the topic of soil biodiversity. This work advanced our theoretical and mechanistic understanding of how top-down processes control soil biodiversity and nutrient cycling.

Wind and Topographic Irregularities Influence Antarctic Melting

Loss of mass from ice sheets contributes to rising sea level. To understand the contributions of ice-sheets to sea level rise we must understand the spatial and temporal variability of ocean-driven melting, which has accelerated over recent decades.  Dutrieux and colleagues used observations and results from numerical modeling to show the case of Pine Island Glacier in the Amundsen Sea in west…

For Ecologists, Is Climate Change Research Sufficiently Complex?

Climate change will alter myriad natural processes as precipitation patterns shift and oceanic and atmospheric temperatures and CO2 concentrations rise. Modern ecology and environmental science has already examined the potential effects of climate change on species and ecosystems, allowing us to elucidate the mechanisms and pathways through which it may operate (Tylianakis et al. 2008)…

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