Controls on tropical Pacific Ocean productivity revealed through nutrient stress diagnostics

Article Abstract:

Distinct fluorescence attributes of phytoplankton are examined in relation to specific physiological responses to nutrient stress in order to evaluate factors that restrict phytoplankton growth in the tropical Pacific Ocean. Three major ecophysiological regimes are demarcated, and it is concluded that iron regulates phytoplankton growth in both high-nitrate low-chlorophyll (HNLC) and oligotrophic waters near the Equator and further south, while nitrogen and zooplankton grazing basically regulate biomass production in the north.

Pacific Ocean, Physiological aspects, Environmental aspects, Food and nutrition, Plants, Natural resources, Phytoplankton, Plant nutrition

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Low sea level rise projections from mountain glaciers and icecaps under global warming

Article Abstract:

A melt model and a geometric volume model are applied to the lower estimate of ice volume and the contribution of glaciers to sea level rise is assessed, excluding those in Greenland and Antarctica. It is found that icecaps melt more slowly than mountain glaciers, whose area declines rapidly in the twenty-first century, making glaciers a limiting source for ice melt, and hence the sea level rise due to melting of mountain glaciers and icecaps is projected.

Science & research, Research, Global warming, Glacial climates

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