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Sea Levels

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Coastal salt in drinking water linked to higher blood pressure worldwide
life-style1 month ago

Coastal salt in drinking water linked to higher blood pressure worldwide

A meta-analysis of 27 population studies (over 74,000 participants across multiple countries) finds that higher salinity in drinking water is associated with higher systolic and diastolic blood pressure and about a 26% higher risk of hypertension, especially in coastal populations where seawater contaminates freshwater. While individual increases are modest, the population-level impact could be substantial, highlighting an environmental factor in cardiovascular risk and the need for better drinking-water standards and further research. In the meantime, checking local water quality and managing overall sodium intake are prudent steps.

via The Independent|
#blood-pressure#high-blood-pressure#life-style
Submerged Migration Routes Rewrite Human Settlement History
science10 months ago

Submerged Migration Routes Rewrite Human Settlement History

A University of Kansas researcher and colleagues have used improved sea-level models and DNA data to identify submerged ancient human migration routes from Africa, revealing that many pathways, including those through Foul Bay and the Nile, were exposed longer than previously thought, which could reshape understanding of early human dispersal and settlement patterns.

via Phys.org|
#ancient-routes#archaeology#dna-evidence
"The Peak of Sea Levels: Unraveling the Timeline of High Water Marks"
science2 years ago

"The Peak of Sea Levels: Unraveling the Timeline of High Water Marks"

Scientists have two main theories about when Earth's sea levels were at their highest, with one suggesting 117 million years ago during the Cretaceous period and the other proposing an even earlier peak. The current rise in sea levels is attributed to climate change, with melting ice and warming oceans playing a significant role. While the last time sea levels were higher than today was around 120,000 years ago, research indicates that Earth's early seas may have held more water than they do now, suggesting that the highest sea levels are likely in the past.

via Livescience.com|
#climate-change#earths-history#global-warming
"Rising Bedrock: How Climate Change is Creating New Islands in Greenland"
environment2 years ago

"Rising Bedrock: How Climate Change is Creating New Islands in Greenland"

Research by the Technical University of Denmark reveals that Greenland's bedrock is rising at an accelerated pace due to the melting of its ice sheet, with an uplift of up to 20 cm over the last decade. This phenomenon, observed through the GNET network, challenges the global trend of rising sea levels and highlights the localized impacts of climate change. The study emphasizes the need for advanced monitoring technologies to understand the complex dynamics of environmental changes and serves as a reminder of the urgent need for continued observation and study of our changing planet.

via Earth.com|
#climate-change#environment#gnet
Lost Civilization: Unveiling the Ancient Inland Sea and Submerged Human Habitation in Northwestern Australia
archaeology2 years ago

Lost Civilization: Unveiling the Ancient Inland Sea and Submerged Human Habitation in Northwestern Australia

Archaeological evidence reveals that a vast region in north-western Australia, now submerged, was once inhabited by First Nations peoples. The region, which connected the Kimberley and western Arnhem Land, covered nearly 390,000 square kilometers and contained archipelagos, lakes, rivers, and a large inland sea. The area could have supported a population of between 50,000 and 500,000 people at various times over the last 65,000 years. Rising sea levels at the end of the last ice age forced populations to retreat as the landscape drowned, leading to the development of new rock art styles. This research highlights the importance of Indigenous knowledge and experience in environmental management and adaptation.

via The Conversation|
#archaeology#australia#continental-shelves
SWOT Satellite Reveals Unprecedented Global Sea Level View
science-and-technology2 years ago

SWOT Satellite Reveals Unprecedented Global Sea Level View

The SWOT satellite, jointly developed by NASA and CNES, has completed its first full science orbit and provided an incredibly detailed map of global sea levels. Using the Ka-band Radar Interferometer (KaRIn) instrument, SWOT collected data on ocean heights, allowing for the mapping of phenomena such as ocean currents and warming. The mission aims to advance climate change research and help communities prepare for a warming world by providing unprecedented knowledge about Earth's surface water.

via TheInertia.com|
#climate-change#data-collection#ocean-currents
Impending Global Ramifications as Gulf Stream Weakens and Approaches Shore
science-and-astronomy2 years ago

Impending Global Ramifications as Gulf Stream Weakens and Approaches Shore

A new study confirms that the Gulf Stream, a crucial ocean current that transports heat and regulates sea levels, is weakening. Over the past four decades, the flow of warm water through the Florida Straits has slowed by 4%, with potential grave implications for global climate. The Gulf Stream is part of the thermohaline circulation, a global conveyor belt of ocean currents that helps control sea levels and hurricane activity. As Earth's climate warms, the influx of cold, fresh water from melting ice sheets could further disrupt the Gulf Stream. Scientists will need to differentiate between natural variability and the impact of global heating to definitively prove climate change's role in the weakening of the current.

via Space.com|
#climate-change#global-warming#gulf-stream
Ancient Climate Shifts Reshaped South Pole Marine Life
science2 years ago

Ancient Climate Shifts Reshaped South Pole Marine Life

A new study published in Earth-Science Reviews reveals how sea-levels and climate change during the Early-Middle Devonian period, around 390-385 million years ago, altered marine ecosystems at the South Pole. The research suggests that the decline and eventual disappearance of the specialized, cool-water Malvinoxhosan marine animals was caused by shifts in sea levels and the warming climate, which allowed warm-water species to take over. This extinction event led to a collapse in polar ecosystems, with biodiversity never recovering. The findings highlight the sensitivity of polar environments to changes in sea level and temperature and have implications for understanding the current biodiversity crisis.

via Phys.org|
#biodiversity#climate-change#extinction-event
Ice Age World Map: A Glimpse into the Past.
science3 years ago

Ice Age World Map: A Glimpse into the Past.

A map created by cartographer Perrin Remonté shows what the world looked like during the Last Glacial Maximum (LGM), or the last ice age, which occurred roughly 26,000 to 19,000 years ago. During this time, sea levels fell more than 400 feet, exposing large areas of the continental shelf. The climate was cold and dry, with temperatures 6°C lower on average. The polar parts of continents were covered by massive ice sheets, and deserts expanded while rivers disappeared. Several large animals, including the woolly mammoth and saber-toothed tiger, roamed the world in extremely harsh conditions, but are now extinct. The article also discusses the possibility of another ice age and how current industrial activities may delay it.

via Visual Capitalist|
#climate-change#glaciers#last-ice-age