Indian ocean may be more disruptive to tropical climate than previously believed gas bijoux nolita

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Today, the Indian Ocean is characterized by uniformly warm and stable rainfall patterns like the seasonal monsoon. electricity experiments for 4th graders New research from The University of Texas at Austin has revealed that during the last ice age the Indian Ocean drove disruptions in tropical rainfall that could be triggered again by future climate change. Credit: Premnath Thirumalaisamy

The Indian Ocean played a far greater role in driving climate change during the most recent ice age than previously believed and may disrupt climate again in the future. gas city indiana zip code That’s according to a new study from The University of Texas at Austin, the findings of which could rewrite established Pacific-centric theories on tropical climate change.

“The processes we have uncovered are particularly important for predicting future impacts of climate change,” said Pedro DiNezio, a research associate at the University of Texas Institute for Geophysics (UTIG) who led the team conducting the study. “If such a climate shift were to happen again, the disruption to rainfall patterns would have serious implications for predicting water availability over the heavily populated Indian Ocean rim.”

The scientists investigated changes in the climate of the tropics during the Last Glacial Maximum (LGM), a period of the ice age 21,000 years ago when ice sheets covered much of North America, Europe and Asia. Although scientists know the tropics changed radically during this time, they did not understand what was driving these climate changes until now.

To find what drove these changes, researchers used a climate model to simulate how various glacial conditions affected climate. They compared simulated outcomes with paleoclimate data (chemical signatures about our past climate stored in rocks and ocean sediments). gasbuddy trip The Indonesian region as it is now (left), and as it was during the last ice age when sea levels were lower and land bridges stretched from Thailand to Australia. Credit: Pedro DiNezio

Scientists know that as ice sheets advanced over Canada and Scandinavia, sea levels lowered by as much as 120 meters (nearly 400 feet), creating vast continental bridges stretching from Thailand to Australia. electricity outage houston tx According to the climate model, these new land masses reversed the prevailing winds, blowing seawater to the west and allowing cold water to cycle up to the surface in the eastern Indian Ocean.

The findings are important because they reveal that the Indian Ocean is capable of driving radical changes in the climate of the tropics and that climate models are able to simulate this complex process. The climate model simulations used in the study reveal changes in sea surface and prevailing winds during the last glacial maximum of the most recent ice age as well as for future climate conditions. Credit: Pedro DiNezio

Paleoclimate data is a collection of evidence about our planet’s past climate found in ice, rock and ocean sediments, known collectively as the geologic record. By studying minerals and fossils preserved in sediments, rock and ice, scientists are able to guess whether the climate was warm or cold, how much or how little it rained, whether large forest fires occurred and even estimate the strength of past storms. gas knife Recent advances in geochemical analysis has allowed scientists to create an even clearer picture of what the climate was like 21,000 years ago.