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Study shows complex connection between meltwater discharge and nutrient input. Observational data clearly shows that Greenland's mighty ice sheet is, slowly but surely, losing the race with rising global temperatures. There, among other things, the meltwater contributes to global sea-level rise. But does it also change the chemistry and biology of the oceans?

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Study shows complex connection between meltwater discharge and nutrient input. Observational data clearly shows that Greenland's mighty ice sheet is, slowly but surely, losing the race with rising global temperatures. There, among bekanntschaften ulm things, the meltwater contributes to global sea-level rise.

But does it also change the chemistry and biology of the oceans? According to a common theory, nutrients in the meltwater trigger plankton blooms off Greenland during the summer months. The team has published its results today in the international journal Nature Communications. It was already clear that more factors than simply the amount of meltwater affect plankton blooms. The fact that the meltwater can cause plankton blooms is due to the way bekanntsschaften release meltwater bekanntschaften ulm sea-level at the coastline.

Meltwater, which flows below the glaciers into the sea, is less dense than the seawater and therefore rises, bekanntschaaften violently, to bekanntschaften ulm surface.

This upwelling process transports nitrate-rich deep seawater to the upper layers of the ocean and thus triggers plankton blooms in the light-flooded surface layers. Based on this result, the partnersuche brackenheim has further calculated what happens when the affected glaciers continue to melt and bekanntschatten inland.

This depth is likely bekanntschaften ulm vary regionally but is generally between about and meters," bekanntschaften ulm the lead author Mark Hopwood. If the glaciers get shallower, then the bskanntschaften effect collapses rapidly. In bekanntschaften ulm terms this means that the relationship between meltwater volume and ocean fertilization is complex. It depends very strongly on the location of the glacial terminus. Bekanntschaften ulm response of summertime marine productivity to increased meltwater discharge around Greenland.

Institutions involved in this study: Mark Hopwood during a measurement campaign on the coast of Greenland. When glaciers terminate off the coast of Greenland at a specific range of weater depths, the meltwater upwelling at the glacier front can cause summer plankton blooms. If the glacier retreats to shallower depths, the upwelling no longer has a fertilizing effect. The usage of the image material provided with this press releas bekanntschaften ulm is free for editorial purposes in conjunction with the content of this press release - given the regarding copyright annotation which are provided in the captions.

Fees, Cost of living etc. Centre Research Studying Discover. The unusual timing of highly-productive summer plankton blooms off Greenland indicates a connection between increasing amounts bekanntschaften ulm meltwater and nutrients in these coastal waters. In a new study published today in the international journal Nature Communications, an international group of bekanntschaften ulm led by the GEOMAR Helmholtz Centre for Ocean Research Kiel shows beanntschaften this connection exists, but is much more complex than widely supposed.

Whether increasing meltwater has a positive or negative effect on summertime phytoplankton depends on the depth at which a glacier sits in the ocean.

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