Recent scientific inquiries indicate that a localized cooling phenomenon in the North Atlantic is indicative of a systemic weakening of the Atlantic Meridional Overturning Circulation (AMOC).

最近的科學研究指出，北大西洋出現的局部冷卻現象，顯示大西洋經向翻轉環流（AMOC）正發生系統性削弱。

The phenomenon designated as the 'warming hole' or 'cold blob' comprises a region southeast of Greenland that has experienced a temperature decrease of approximately 1°C over several decades. While alternative hypotheses attributed this anomaly to atmospheric variables—specifically increased cloud cover and evaporative cooling driven by wind—research led by Wei Liu of the University of California, Riverside, suggests an oceanic origin. The observation that the thermal anomaly extends to a depth of 1,000 meters supports the conclusion that the primary driver is a deceleration of the AMOC.

被稱為「暖洞」或「冷斑」的現象，是指格陵蘭東南一個在過去數十年溫度下降約 1°C 的區域。雖然有其他假設將此異常現象歸因於大氣變量——特別是雲層增加和風驅動的蒸發冷卻——但由加州大學河濱分校的 Wei Liu 領導的研究建議其源自海洋。觀察到熱異常延伸至 1,000 公尺深，此發現支持了主要驅動力為 AMOC 減速的結論。

Historically, the AMOC functions as a thermohaline conveyor, transporting warm, saline tropical waters northward, where they subsequently cool and descend. The current systemic instability is attributed to the influx of freshwater from the Greenland ice sheet. This dilution of salinity reduces the density of the surface water, thereby impeding the sinking process essential for circulation maintenance. Projections suggest a minimum 20% reduction in AMOC strength by 2100, with the theoretical possibility of total cessation.

在歷史上，AMOC 扮演著溫鹽傳送帶的角色，將溫暖且高鹽分的熱帶海水向北輸送，隨後海水冷卻並下沉。目前的系統性不穩定歸因於格陵蘭冰蓋流入的淡水。鹽度的稀釋降低了表面海水的密度，從而阻礙了維持環流至關重要的下沉過程。預測顯示，到 2100 年 AMOC 的強度將至少減少 20%，理論上甚至有可能完全停止。

The geopolitical and environmental implications of such a deceleration are extensive. In Northwest Europe, a collapse could precipitate a transition to climatic conditions resembling those of Canada, characterized by prolonged, frigid winters. In North America, evidence suggests that AMOC weakening has already contributed to a 20-50% increase in coastal flooding days along the Northeast coast since 2005. Furthermore, the Intergovernmental Panel on Climate Change (IPCC) and other researchers indicate potential disruptions to rainfall patterns in the Sahel region of Africa, monsoon zones in Asia, and storm tracks across eastern North America.

此類減速對地緣政治和環境的影響十分廣泛。在西北歐，一旦崩潰可能會導致氣候轉變至類似加拿大的狀況，其特徵為漫長且嚴寒的冬季。在北美，證據顯示自 2005 年起，AMOC 削弱已導致東北海岸的沿海淹水天數增加了 20-50%。此外，政府間氣候變化專門委員會（IPCC）和其他研究人員指出，非洲薩赫爾地區的降雨模式、亞洲的季風區以及北美東部的風暴路徑都可能受到干擾。

The North Atlantic cold blob serves as a primary indicator of AMOC instability, posing significant risks to global weather regulation and coastal stability.

北大西洋冷斑是 AMOC 不穩定的主要指標，對全球天氣調節和沿海穩定構成重大風險。