Friday , January 22 2021

Increasing temperatures to make oceans warmer and greener | Environment



Blues and grass grass will become more bluer and greener by the end of the century as a result of global warming, scientists have found.

Researchers say that the color changes come to the effect of climate change on small-water organisms populations, called phytoplankton, which translates sunlight into chemical energy through photosynthesis, as well as effects on other colorful components of the oceans.

"Similarly, plants on land are green, phytoplankton is also green, so the amount and types of phytoplankton affect the surface of the sea," said Dr Anna Hickman, the author of the research of the school of ocean and earth science at the University of Southampton.

The ability to detect changes in such organism levels is important, Hickman added. "We are interested in phytoplankton because they are small marine plants, they contribute about half of global photosynthesis, they are the base of the marine food web."

Writing in the Nature Communications magazine, Hickman and UK and US colleagues report how they came to their collections using a computer model that predicts how factors such temperatures, ocean bogs and acid acidity affect the growth and types of phytoplankton in the water, as well as organic material levels and other color detritus. However, in an important injection to previous studies, they also explore how such changes would affect absorption and light reflection on the surface of the sea.

Marine diatom cells (Rhizosolenia setigera), which is an important group of phytoplankton



Marine diatom cells (Rhizosolenia setigera), which is an important group of phytoplankton. Photograph: Karl Bruun / AP

The results are revealed if the global sea surface temperature rises 3C (5.4F) by 2100 – as expected from the current situation – a color more than half the oceans, by including northern Atlantic, change.

Hickman said: "It's smooth, where the water is quite blue right now because of the phytoplankton [have a] relatively low biomass, you will see the water getting bigger, and where the sea is relatively greener because the biomass is higher, you'll see [it] get [greener]. "

That, which the authors say, reflects shifts in phytoplankton populations, and the effects of collapse, which are derived from factors including a recession of ice and sea near the poles, increasing temperature and less mix of waters.

"When looking at the color of the sea alone, and how that will change in the future by monitoring satellites, in fact, we will give us early warning of phytoplankton changes," said Hickman.

Significantly, he said, the change of reflection of blue / green light appears to give an earlier sign of changes to phytoplankton than estimates of the amount of chlorophyll present, a measure currently used to monitor phytoplankton levels.

The researchers probably suggested that a number of factors emerge, including changes in ocean color not only consider changes in phytoplankton – which can dramatically vary, though An example with the season – but also changes in the existing species, is an important consideration because different types of phytoplankton use chlorophyll but absorb slightly different light waves.

Hickman said this was useful, since the use of satellite data to examine specific changes in blue / green light can reveal changes in the phytoplankton population. This can then give a more accurate reflection of the climate trend or calculate chlorophyll levels of this data, which only gives sense of the size of phytoplankton.

However, it does not seem that artists do not need to worry about upgrading their pallets. "It's likely that we will anticipate that the color change will not be clear to the naked eye," said Hickman.


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