Circulation

Schematic of Antarctic Bottom Water formation, with weaker easterly winds bringing less sea ice to the region, which creates areas of open ocean exposed to cold air where 'sea ice factories' occur. As more sea ice forms, salt is expelled into the surrounding ocean, creating denser water that sinks to the abyss. Credit: Journal of Geophysical Research: Oceans (2023). DOI: 10.1029/2023JC019774 Earth's oceans are a complex…

AMOC can regulate wave activities over the mid-to-high latitudes in the Northern Hemisphere, which has a direct impact on extreme weather at mid-to-high latitudes in Eurasia (hereafter referred to as the MHEA). During boreal winters, strong AMOC regulates the Rossby wave train that originates from the North Atlantic and crosses mid-to-high latitudes, which increases the variability in the circulation anomalies in the Ural blocking area and Siberia and…

Reader survey As a reader of PREMIUM TIMES, your opinion matters. Please take our survey to help us better understand the values and preferences of our readers. Your feedback will give us valuable insights into how we can tailor the different types of content we offer to meet your needs. The survey should only take about 6-8 minutes to complete. Click here to take it. The Central Bank of Nigeria (CBN) has denied reports that it plans to withdraw the recently redesigned N1000, N500, and N200 currency…

Off the coast of Antarctica, trillions of tons of cold salty water sink to great depths. As the water sinks, it drives the deepest flows of the "overturning" circulation – a network of strong currents spanning the world's oceans.The overturning circulation carries heat, carbon, oxygen, and nutrients around the globe, and fundamentally influences climate, sea level, and the productivity of marine ecosystems.But there are worrying signs these currents are slowing down. They may even collapse.If this happens, it would…

An ensemble of marine fossil 14C/C and a first-order test of fidelity.(A) Locations for all deep-sea proxy seawater 14C/C measurements used in this study, all of which are below the neutral density surface (γn) = 27.5 kg m−3 (below the depth of intermediate water masses). Open symbols are mid-depth sites above or on the neutral density surface γn = 28.0 kg m−3. Closed symbols are γn > 28.0 kg m−3 “bottom water” sites. Diamonds are sites with new data…

Credit: Pixabay/CC0 Public Domain In July 2021, unprecedented heavy rainfall occurred in Zhengzhou (east-central China) against a background of a northward shift in the western Pacific subtropical high (WPSH), which is a key atmospheric circulation system affecting the East Asian summer climate. Due to complex air–sea–land…

Credit: Chaleephoto/Shutterstock Sometimes it seems like winter just can't make up its mind—is it going to be harsh or mild? A little bit of both? New research from the University of Tsukuba shows how a better understanding of large-scale weather patterns can help meteorologists improve seasonal forecasts and prepare us for dramatic shifts in weather conditions. …

Nodules on the seafloor at the study site, photographed by an underwater camera. Credit: YAO HuiqiangAntarctic bottom water (AABW) covers more than two-thirds of the global ocean bottom, and its formation has recently decreased. However, its long-term variability has not been well understood.Researchers led by Prof. Chenglong Deng from the Institute of Geology and Geophysics (IGG) of the Chinese Academy of Sciences (CAS) and their collaborators have reconstructed AABW history back to approximately 4.7 million years ago…

Nodules on the seafloor at the study site, photographed by an underwater camera. Credit: Yao Huiqiang Antarctic bottom water (AABW) covers more than two-thirds of the global ocean bottom, and its formation has recently decreased. However, its long-term variability has not been well understood. Researchers led by Prof. Deng…

In wake of the Delhi High Court ordering the taking down of sexually explicit video of a judicial officer, social media platforms on Friday told the court that they have removed the video and blocked several URLs.However, WhatsApp, the Meta-owned instant messaging app, told the court that it is not possible to erase the video from the platform until unless it is provided with users's phone numbers and the court's order.Appearing for WhatsApp, senior advocate Kapil Sibal said that if they are provided with phone numbers,…