Search Results for ‘singh’

Siri Jodha Singh Khalsa: An Earthzine Personal Profile

Siri Jodha Singh Khalsa
The business of standards within the developing GEOSS community requires the commitment, expertise, and networking capabilities of a host of individuals. Foremost among these is Siri Jodha Singh Khalsa of the National Snow and Ice Data Center (NSIDC), in Boulder, Colorado. Since receiving his B.A. in Physics from the University of California, Irvine, and his Ph.D. in Atmospheric Sciences from the University of Washington, Seattle, Khalsa has been a major contributor to a variety of data programs. His activity in leading the IEEE effort in standards and interoperability for GEOSS is a natural extension of his work in these programs, albeit on a global scale.

Stress Tests for the Sea: Can Fisheries Withstand Ocean Acidification?

West Coast marine ecosystems host a large number of species, exemplified in this image from a NOAA survey dive close to Catalina Island, just off the southern California coast. Ecosystem models simulate interactions among species and between species and their environment. Image Credit:  Adam Obaza/NOAA
Ocean acidification is a new challenge to fisheries managers. Tools available today offer multiple avenues for considering the phenomenon

Probing Human Vulnerability to Ocean Acidification Uncovers Mitigation and Adaptation Opportunities

Figure 2: Overall vulnerability of U.S. regions to ocean acidification. Social vulnerability is shown on land, in red tones, and severity of ocean acidification (purple) and its local amplifiers (algal overgrowth, in yellow stars  and “E( x/y)”; low-pH river discharge, yellow triangles and “R (x/y)”; upwelling, “U”) is shown over the water. E(x/y) notes the number of highly eutrophic estuaries (x) relative to the total number of estuaries evaluated in each region (y), while R(x/y) notes the number of rivers with low carbonate ion levels and high annual discharge volume (x) relative to the total number of rivers in a region (y). Darker colors indicate higher vulnerability or hazard. Purple scale indicates the year at which average ocean chemistry will reach a lethal level for larval shellfish. Reprinted from Ekstrom et al. [23] with permission of Nature Climate Change.
Sarah Cooley, Ocean Conservancy Julia Ekstrom, U. California Davis Lisa Suatoni, Natural Resources Defense Council Ocean acidification has recently elbowed its way onto the list of wicked problems that coastal communities need to plan for. Coastal communities depend on a variety of oceanic goods and services, often led by marine harvests [1]. However, ocean acidification […]

In the Journals: Water

A woman in El Fasher, North Darfur, uses a Water Roller ---  the device frees women and children from having to spend a large portion of every day dedicated to collecting water for their households. Image Credit: UN Photo/Albert Gonzalez Farran
Water was the topic of our first “mini theme” in March, a new little feature meant to complement our larger quarterly themes. This month we introduce a new feature, a blog called “In the Journals,” to highlight recent reports and articles that address subjects related to our mini themes. March was chosen for water namely […]

STEP M: Space to Effectively Prepare for Migration

Figure 6. Estimated impact of different levels of salinity ingress (Siddique et al., 2011)
Introduction Climate change will increasingly impact the Earth’s natural environment in many ways, such as more frequent natural disasters, heat waves, melting polar ice, and rising sea levels. Many of the anticipated effects of climate change also will become driving factors of human migration over short and long timescales. Climate change driven migration (CCDM) results […]