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Joint research by Chinese and international scientists have found that the rate of long-term Antarctic mass loss has slowed, driven by sea surface temperature anomalies in the remote tropical warm pool, China Central Television (CCTV) reported on Thursday, citing a statement released by the Institute of Oceanology, Chinese Academy of Sciences (CAS).
The Antarctic ice sheet is one of the major sources of uncertainty in global sea-level rise forecasts. From 2003 to 2024, the Antarctic ice sheet lost an average of approximately 140.5 billion tons each year, CCTV reported.
However, Chinese and foreign scientists have found that the Antarctic ice sheet gained roughly 695 billion tons between July 2021 and April 2023, the largest 22-month mass gain seen in nearly two decades via satellite gravimetry, the Institute of Oceanology, CAS announced on Thursday.
The scientists found out that from 2021 to 2023, sustained heavy snowfall in East Antarctica led to significant increases in snow accumulation, partially offsetting the ongoing ice loss in West Antarctica.
The scientists' research shows that this was caused by tropical ocean-driven atmospheric processes that altered moisture transport pathways and increased snowfall over Antarctica.
The research was conducted by the research team at the Institute of Oceanology at CAS, along with peers from countries including the US, Hungary and Japan. It was published in the academic journal Nature on Wednesday.
According to Wang Yunhe, first author of the research paper and an associate research fellow at the Institute of Oceanology, sea surface temperatures in the tropical western Pacific warm pool remained unusually warm from 2021 to 2023. As one of the regions with the highest sea surface temperatures and strongest heat release into the atmosphere worldwide, changes in this region can reshape atmospheric circulation.
The persistently warmer-than-normal seawater triggered large-scale atmospheric waves.
After reaching the high latitudes of the Southern Hemisphere, the waves reshaped wind patterns and moisture transport pathways. Moisture-tracking simulations show that water vapor from the mid-latitude Indian Ocean fueled heavy snowfall in East Antarctica, leading to a recovery in ice sheet mass.
Observations and climate simulations suggest that such warming events occur roughly once a decade. But these temporary pauses are not enough to reverse Antarctica's long-term ice loss. The West Antarctic ice sheet continues to shrink, while parts of East Antarctica remain increasingly vulnerable to warmer ocean waters melting ice shelves from below and speeding the flow of glaciers into the sea.
The study shows how persistent warming in the tropical warm pool can contribute to the recovery of Antarctic ice-sheet mass, highlighting the role of East Antarctic atmospheric circulation in connecting tropical climate shifts with changes in the ice sheet. The findings point to a previously overlooked climate link between the tropical warm pool and East Antarctica, offering a new perspective on how distant climate systems may shape the continent's future.
Global Times
。 2025年1月10日，公安部在北京召开新闻发布会，通报一年来全国公安机关维护国家政治安全和社会稳定，以高水平安全保障高质量发展，为推进中国式现代化保驾护航取得的成效情况。公安部新闻发言人张明介绍，2024年，全国刑事案件同比下降25.7%，治安案件同比基本持平，社会治安形势持续保持平稳。
二 | 张明表示，公安部坚持依法严打方针不动摇，常态化开展扫黑除恶斗争，全国共侦办涉黑案件121起，恶势力犯罪案件1883起，破获各类刑事案件1.17万起。破获枪爆案件2.2万起，全国持枪、爆炸犯罪案件同比下降37.5%；打掉赌博团伙7000余个；破获长江水域突出违法犯罪6700余起；破获食品药品安全犯罪案件1.7万余起；侦破毒品案件3.8万起，缴获各类毒品24.4吨。与此同时，公安部依法严厉打击、严密防范各类经济犯罪活动，共破获现行经济犯罪案件7.8万起，挽回经济损失306.7亿元。
三 | 开展“国门利剑2024”联合行动，侦办各类走私犯罪案件5719起，案值1219.3亿元。扎实推进美丽中国建设，侦办破坏环境资源保护犯罪案件4.8万起。此外，2024年，全国公安机关共有208名民警、174名辅警因公牺牲，4743名民警、3710名辅警因公负伤，授予（追授）全国公安系统一级英模2名、二级英模59名，选树宣传全国“公安楷模”个人2名、集体6个，“最美基层民警”20人。在打击电信网络诈骗犯罪方面，张明介绍，截至2024年底，已累计抓获中国籍涉诈犯罪嫌疑人5.3万余名，彻底摧毁臭名昭著的缅北果敢“四大家族”犯罪集团，临近我国边境的缅北地区规模化电诈园区被全部铲除，专项工作取得阶段性重大战果，带动全国电信网络诈骗立案数和损失大幅下降。目前，“四大家族”犯罪集团案件已经陆续进入诉讼环节。张明表示，全国公安机关将纵深推进“云剑”“断流”“拔钉”等专项行动，持续保持严打高压态势。对境外诈骗窝点，全面开展国际执法合作，坚持不懈盯着打、追着打，坚决摧毁境外诈骗窝点，通缉重大涉诈逃犯。对境内黑灰产团伙，深入开展侦查研判，不间断组织集群战役和区域会战，全面起底和清理境内推广引流、转账洗钱等涉诈黑灰产，坚决斩断境内犯罪关键链条。在打击网络暴力方面，张明表示，依托“净网”专项行动，公安部持续开展打击整治网络暴力专项行动，围绕网上热点舆情事件和群众反映强烈的网络暴力问题，比如“开盒挂人”“短信轰炸”“编造黄谣”“有偿代骂”等，重拳出击、依法打处。2024年，全国公安机关共办理网络暴力案件8600余起，依法采取刑事强制措施2500余人，行政处罚8500余人。下一步，公安机关将坚持打击、整治、宣传同步发力、同步推进，继续依法严惩网络暴力违法犯罪活动，坚决铲除网络暴力滋生土壤，切实维护广大人民群众合法权益和网络生态秩序。同时，公安机关再次提示：网络不是法外之地，希望广大网民自觉遵守法律法规，规范网上言行，主动抵制网络暴力行为，我们共同携手营造风清气正的网络空间。在打击食品领域犯罪方面，张明介绍，公安部持续将打击涉食品安全犯罪作为工作重点，全年共破获食品安全犯罪案件1.2万起。针对一些地方非法制售“特供酒”犯罪多发势头，专门部署开展“净风”专项行动，共侦破大要案件380余起；专门部署开展打击肉制品犯罪破案攻坚，共侦破案件2600起，消除了一批食品安全风险隐患。
四 | 下一步，公安机关将聚焦广大群众对食品安全的关切，持续严打食品安全犯罪，助力提升食品安全治理水平。经党中央批准，自2021年起，将每年的1月10日设立为“中国人民警察节”。张明介绍，在第五个中国人民警察节到来之际，公安部组织开展了形式多样的庆祝活动。来源：中国银行保险报。
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