The Sea of Japan, with temperatures hitting a June-record 19 degrees Celsius in some areas, has brought a climate surprise to Vladivostok. Since all seas and oceans are interconnected, large-scale climate changes are shifting current systems worldwide. This planetary circulation has driven massive amounts of heat into the region, causing abnormally warm waters in Primorye.
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The powerful, warm Pacific Kuroshio Current brings pufferfish, mako sharks, and massive bluefin tuna into the Vladivostok waters. This pattern was identified by scientists from the Il'ichev Pacific Oceanological Institute (POI FEB RAS) using satellites and mathematical models. Water flows passing through the Tsushima Strait travel to the coast of Japan, while a portion moves toward the coast of Primorye, influencing the migration of southern fish.
The role of methane in rising global temperatures is underestimated, and annual natural CH₄ emissions into the atmosphere may significantly exceed the figures stated in reports by the Intergovernmental Panel on Climate Change (IPCC). This is the conclusion reached by Russian scientists studying the fluxes of greenhouse gases, carbon dioxide (CO₂), and methane (CH₄) in the Arctic "land–shelf–atmosphere" system.
The Marine Experimental Station at Cape Shultsa greeted the film crew of Public Television of Primorye with a warning sign: "Do not enter! Tiger tracks detected." However, even more fascinating tracks are being left in the seas by robotic monitoring technologies for space, ocean, and aquaculture. We traced the path from fundamental oceanological science in Vladivostok, through engineering and naval architectural design in St. Petersburg, to the construction of an ocean fish farm in China's Guangdong Province.
In the protected zone of the Sea of Japan, where the waters of the Tumen River occasionally flow, complete anoxia was recorded in 2013—all living organisms died due to the mass die-off of phytoplankton. Such phenomena occur under specific hydrological conditions. Overall, "dead zones" are rare, but they do occur in the Amur and Surinsky bays, as well as in the estuaries of the Tumen and Razdolnaya rivers.
