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Beyond blooms: the winter ecosystem reset determines microeukaryotic community dynamics in the Fram Strait 藻华之外:冬季生态系统重置决定弗拉姆海峡微真核细胞群落动态
IF 8.1 1区 地球科学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2024-10-29 DOI: 10.1038/s43247-024-01782-0
Ellen Oldenburg, Raphael M. Kronberg, Katja Metfies, Matthias Wietz, Wilken-Jon von Appen, Christina Bienhold, Ovidiu Popa, Oliver Ebenhöh
The Arctic Ocean is undergoing a major transition as a result of global warming, with uncertain consequences for its ecosystems. Our study introduces an integrated analytical approach using co-occurrence networks, convergent cross-mapping, and energy landscape analysis. Applied to four years of amplicon data from Fram Strait, located at the boundary between Arctic and Atlantic waters, our method identifies keystone species in seasonal microbial communities, elucidates causal interactions, and predicts stable configurations across changing environments. We find strong evidence for a “winter reset”, implying that organisms representing the spring bloom are largely determined by prevailing environmental conditions during winter. In addition, our analysis suggests that winter communities may adapt more readily to expected Atlantification than summer communities. These results highlight the utility of innovative time-series analyses in disentangling ecosystem dynamics. This approach provides critical insights into Arctic ecological interactions, dynamics, and resilience and aids in understanding ecosystem responses to environmental change. Winter environmental conditions largely determine prevailing organisms of spring blooms in the Fram Strait, according to a combined framework of co-occurrence networks, convergent cross-mapping networks, and energy landscape analysis.
由于全球变暖,北冰洋正在经历重大转变,对其生态系统造成了不确定的后果。我们的研究采用共现网络、会聚交叉映射和能量景观分析等综合分析方法。我们的方法应用于位于北极和大西洋水域交界处的弗拉姆海峡四年的扩增子数据,识别了季节性微生物群落中的关键物种,阐明了因果互动关系,并预测了在不断变化的环境中的稳定配置。我们发现了 "冬季重置 "的有力证据,这意味着代表春季开花的生物在很大程度上取决于冬季的主要环境条件。此外,我们的分析表明,冬季群落可能比夏季群落更容易适应预期的亚特兰蒂斯化。这些结果凸显了创新性时间序列分析在厘清生态系统动态方面的作用。这种方法提供了对北极生态相互作用、动态和恢复力的重要见解,有助于理解生态系统对环境变化的反应。根据共现网络、聚合交叉映射网络和能量景观分析的组合框架,冬季环境条件在很大程度上决定了弗拉姆海峡春季开花的主要生物。
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引用次数: 0
Accelerated North Atlantic surface warming reshapes the Atlantic Multidecadal Variability 北大西洋表层加速变暖重塑大西洋十年多变性
IF 8.1 1区 地球科学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2024-10-29 DOI: 10.1038/s43247-024-01804-x
Davide Zanchettin, Angelo Rubino
Observed North Atlantic sea-surface temperatures are modulated by a recurrent alternation of anomalously warm and cold interdecadal phases known as Atlantic Multidecadal Variability. Here we use observations and a multi-model ensemble of climate simulations to demonstrate an ongoing acceleration of North Atlantic surface warming, which implies a smaller contribution of the Atlantic Multidecadal Variability to 21st century North Atlantic sea-surface temperature anomalies than previously thought. Future projections of the Atlantic Multidecadal Variability from realistic climate simulations are poorly constrained, yet a relaxation to a neutral phase by the mid-21st century emerges as the most probable evolution of the Atlantic Multidecadal Variability. In the simulations, the mitigating effects of a less likely upcoming cold phase of the Atlantic Multidecadal Variability are overwhelmed by fast North Atlantic surface warming, which is robustly projected to persist in upcoming decades independent of emission scenarios. Sustained North Atlantic surface warming is therefore expected to continue in the near future. Warming of North Atlantic sea surface temperatures is accelerating, and projected to be stronger than natural variability associated with the Atlantic Multidecadal Variability, according to an analysis of climate model simulations.
观测到的北大西洋海面温度受被称为 "大西洋多年代变率 "的年代际异常冷暖交替现象的影响。在这里,我们利用观测数据和多模式气候模拟集合来证明北大西洋表面温度正在加速变暖,这意味着大西洋多年代变率对 21 世纪北大西洋海面温度异常的影响比以前认为的要小。现实气候模拟对大西洋多年代变率的未来预测限制较少,但大西洋多年代变率最有可能的演变是到 21 世纪中叶放松到中性阶段。在模拟中,北大西洋地表快速变暖压倒了大西洋多年变率不太可能出现的寒冷阶段的缓解效应,而北大西洋地表变暖预计将在未来几十年持续存在,与排放情景无关。因此,预计在不久的将来,北大西洋海面将继续持续变暖。根据对气候模型模拟的分析,北大西洋海面温度正在加速变暖,预计将强于与大西洋十年多变性相关的自然变率。
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引用次数: 0
Ditch emissions partially offset global reductions in methane emissions from peatland drainage 沟渠排放部分抵消了全球因泥炭地排水而减少的甲烷排放量
IF 8.1 1区 地球科学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2024-10-29 DOI: 10.1038/s43247-024-01818-5
Dezhao Gan, Zelong Zhang, Huinan Li, Dongsheng Yu, Zheng Li, Ruijun Long, Shuli Niu, Hongchao Zuo, Xianhong Meng, Jinsong Wang, Lei Ma
Peatlands are globally important carbon sinks but are frequently drained. Drainage activities reduce overall methane emissions; however they are often accompanied by the construction of ditches, which are potential methane emission hotspots. Yet, the offsets of methane emissions from creating ditches in peatlands under different climate zones and land-use types remain unclear. Here we conducted a global meta-analysis by compiling annual methane emissions from paired near-pristine peatlands and terrestrial portion of drained peatlands and ditches to address this issue. Results showed that ditches occupy approximately 3.8 (95% confidence interval: 3.1~4.4)% of all drained peatlands. Ditches emit 695 (511~898) kg ha−1 yr−1 methane overall, with the highest emissions observed in (sub)tropics. Globally, ditch emissions offset approximately 12 (10~14)% for reductions in methane emissions from peatland drainage. Our findings demonstrate the importance of including ditch methane emissions to quantify emission factors for regional to global peatlands affected by drainage. Peatland ditches are methane emissions hotspots that offset around 12% of the emissions reductions that result from drainage, according to a global meta-analysis of peatland studies.
泥炭地是全球重要的碳汇,但经常被排水。排水活动可减少甲烷的总体排放量;但排水活动往往伴随着沟渠的修建,而沟渠是潜在的甲烷排放热点。然而,在不同气候带和土地利用类型下,在泥炭地修建沟渠对甲烷排放的抵消作用仍不明确。为了解决这个问题,我们在这里进行了一项全球荟萃分析,汇编了成对的近原始泥炭地以及排水泥炭地和沟渠的陆地部分的甲烷年排放量。结果显示,沟渠约占所有排水泥炭地的 3.8%(95% 置信区间:3.1~4.4)。沟渠的甲烷总排放量为 695 (511~898) kg ha-1 yr-1,(亚)热带地区的排放量最高。在全球范围内,沟渠排放抵消了泥炭地排水甲烷排放减少量的约 12 (10~14)%。我们的研究结果表明,将沟渠甲烷排放纳入量化受排水影响的区域乃至全球泥炭地排放因子非常重要。根据对泥炭地研究的全球荟萃分析,泥炭地沟渠是甲烷排放热点,可抵消因排水而减少的约 12% 的甲烷排放量。
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引用次数: 0
Demographics shape public preferences for carbon dioxide removal and solar geoengineering interventions across 30 countries 人口结构决定了 30 个国家公众对二氧化碳清除和太阳能地球工程干预措施的偏好
IF 8.1 1区 地球科学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2024-10-29 DOI: 10.1038/s43247-024-01800-1
Benjamin K. Sovacool, Darrick Evensen, Chad M. Baum, Livia Fritz, Sean Low
Climate intervention technologies such as carbon dioxide removal and solar geoengineering are becoming more actively considered as solutions to global warming. The demographic aspects of the public serve as a core determinant of social vulnerability and the ability for people to cope with, or fail to cope with, exposure to heat waves, air pollution, or disruptions in access to modern energy services. This study examines public preferences for 10 different climate interventions utilizing an original, large-scale, cross-country set of nationally representative surveys in 30 countries. It focuses intently on the demographic dimensions of gender, youth and age, poverty, and income as well as intersections and interactions between these categories. We find that support for the more engineered forms of carbon removal decreases with age. Gender has little effect overall. Those in poverty and the Global South are nearly universally more supportive of climate interventions of various types. Public support for solar geoengineering and carbon dioxide removal methods decreases with age, and gender has little effect overall, according to an analysis combining the survey of 30 844 participants from 30 countries and a statistical approach.
二氧化碳清除和太阳能地球工程等气候干预技术正被更积极地视为解决全球变暖问题的办法。公众的人口结构是决定社会脆弱性以及人们应对或无法应对热浪、空气污染或现代能源服务中断的能力的核心因素。本研究利用在 30 个国家进行的一套原创性、大规模、跨国的全国代表性调查,研究了公众对 10 种不同气候干预措施的偏好。研究重点关注性别、青年和年龄、贫困和收入等人口因素,以及这些因素之间的交叉和相互作用。我们发现,随着年龄的增长,人们对工程化程度较高的碳清除方式的支持度会降低。性别在总体上影响不大。贫困人口和全球南部人口几乎普遍更支持各种类型的气候干预措施。根据对来自 30 个国家的 30 844 名参与者的调查和统计方法的综合分析,公众对太阳能地球工程和二氧化碳清除方法的支持随着年龄的增长而减少,而性别在总体上影响不大。
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引用次数: 0
Iron transformation mediates phosphate retention across a permafrost thaw gradient 铁转化介导磷酸盐在永久冻土融化梯度上的保留
IF 8.1 1区 地球科学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2024-10-29 DOI: 10.1038/s43247-024-01810-z
Maximilian Barczok, Chelsea Smith, Lauren Kinsman-Costello, Monique Patzner, Casey Bryce, Andreas Kappler, David Singer, Elizabeth Herndon
Phosphorus limits primary productivity in many (Sub-)Arctic ecosystems and may constrain biological carbon sequestration. Iron (III) oxides strongly bind phosphate in soils but can dissolve under flooded, reducing conditions induced by permafrost thaw and ground collapse. The ability for iron to regulate phosphate storage and solubility in thawing permafrost landscapes remains unclear. Here, iron-rich sediments containing iron oxides and organic-bound iron were incubated with or without added phosphate in soils along a permafrost thaw gradient to evaluate how iron-phosphate associations respond to thaw-induced redox shifts. Iron oxides partially dissolved and released sorbed phosphate when incubated in soils underlain by degraded permafrost. Iron complexed by organic matter remained stable but provided no phosphate binding capacity. Phosphate addition enhanced iron oxide dissolution and phosphorus concentrations in associated microbial biomass. Our study demonstrates that the capacity for iron oxides to immobilize and retain phosphate in permafrost peatlands decreases with permafrost thaw. Thawing of permafrost in peatlands decreases the immobilization and retention of phosphate with Fe oxides and releases initially sorbed phosphate, according to incubation experiments with Fe-rich sediments in soil along a permafrost thaw gradient.
磷限制了许多(亚)北极生态系统的初级生产力,并可能制约生物碳固存。铁(III)氧化物与土壤中的磷酸盐紧密结合,但在永久冻土融化和地面塌陷引起的淹没、还原条件下会溶解。目前还不清楚铁在解冻的永久冻土地貌中调节磷酸盐储存和溶解度的能力。在这里,将含有铁氧化物和有机结合铁的富铁沉积物与或不与添加磷酸盐的土壤沿永久冻土融化梯度培养,以评估铁与磷酸盐的结合如何对融化引起的氧化还原转变做出反应。在退化的永久冻土层下的土壤中培养时,氧化铁部分溶解并释放出吸附的磷酸盐。与有机物络合的铁保持稳定,但不提供磷酸盐结合能力。磷酸盐的添加增强了氧化铁的溶解和相关微生物生物量中磷的浓度。我们的研究表明,氧化铁固定和保留永久冻土泥炭地中磷酸盐的能力会随着永久冻土的解冻而降低。根据沿永久冻土融化梯度对土壤中富铁沉积物进行的培养实验,泥炭地永久冻土的融化会降低氧化铁对磷酸盐的固定和保留能力,并释放最初吸附的磷酸盐。
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引用次数: 0
Supraglacial and subglacial ecosystems contribute differently towards proglacial ecosystem communities in Kuoqionggangri Glacier, Tibetan Plateau 上冰川和亚冰川生态系统对青藏高原郭琼岗日冰川前冰川生态系统群落的不同贡献
IF 8.1 1区 地球科学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2024-10-29 DOI: 10.1038/s43247-024-01809-6
Zhihao Zhang, Yongqin Liu, Keshao Liu, Yuying Chen, Xuezi Guo, Mukan Ji, Weishu Zhao
Glaciers are experiencing unprecedented global warming, resulting in significant changes to microbial communities and nutrient transport within glacial ecosystems. However, the influence of supraglacial and subglacial ecosystems on the proglacial ecosystem remains poorly understood. Here, we investigated microbial communities across seven habitats in three glacial ecosystems on the Tibetan Plateau using 16S rRNA sequencing. Our results revealed that the proglacial ecosystem exhibited higher alpha diversity but lower network stability than other ecosystems. Moreover, supraglacial and subglacial ecosystems contributed differently to the community diversity and stability of the proglacial ecosystem. Supraglacial ecosystems provided more high-abundance species and had a greater impact on the proglacial ecosystem’s stability, while subglacial ecosystems released a broader range of diverse taxa. These findings highlight the distinct influences of supraglacial and subglacial ecosystems on microbial community dynamics in proglacial environments, offering insights into their interactions and potential impacts on downstream environments as glaciers retreat. Proglacial ecosystem community structure is driven both by high-abundance supraglacial ecosystems and high-diversity subglacial ecosystems, according to in-situ data from the Tibetan Plateau
冰川正经历着前所未有的全球变暖,导致冰川生态系统中的微生物群落和营养物质运输发生了重大变化。然而,人们对上冰川和亚冰川生态系统对前冰川生态系统的影响仍然知之甚少。在这里,我们利用 16S rRNA 测序技术研究了青藏高原三个冰川生态系统中七个生境的微生物群落。结果发现,与其他生态系统相比,前冰川生态系统表现出更高的α多样性,但网络稳定性较低。此外,超冰川生态系统和亚冰川生态系统对前冰川生态系统群落多样性和稳定性的贡献不同。超冰川生态系统提供了更多的高丰度物种,对原冰川生态系统的稳定性产生了更大的影响,而亚冰川生态系统则释放了更广泛的多样化类群。这些发现凸显了超冰川生态系统和亚冰川生态系统对冰川环境中微生物群落动力学的不同影响,为冰川退缩时它们之间的相互作用以及对下游环境的潜在影响提供了启示。根据青藏高原的原位数据,冰川生态系统群落结构是由高丰度的超冰川生态系统和高多样性的亚冰川生态系统共同驱动的
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引用次数: 0
Minimum velocity for impact ejecta to form secondaries on terrestrial bodies 撞击喷出物在陆地天体上形成次级的最小速度
IF 8.1 1区 地球科学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2024-10-29 DOI: 10.1038/s43247-024-01820-x
Rui Xu, Zhiyong Xiao, Yichen Wang, Fanglu Luo, Yizhen Ma
The minimum velocity (v) for impact ejecta to form secondary craters (secondaries) remains enigmatic, but it is a crucial parameter in untangling the fate of impact ejecta on planetary surfaces. By cataloging the distances (L) of the nearest secondaries from centers of various-sized (D) primary craters (primaries) on the Moon, Mars and Mercury, we find that v can be as small as ~25 m/s, and an unified power-law relationship of L = 1.86D0.93 (both in meters) works for both simple and complex craters, regardless of different surface gravity and target properties. This relationship also successfully predicts occurrences of secondaries formed by craters on Venus. The constraint on v explains the common concurrences of structural disturbances in crater walls and continuous ejecta deposits caused by landing of cogenetic ejecta, suggesting that ejecta forming self-secondaries do not need near-vertical ejection angles and tertiary craters should be abundant on terrestrial bodies. Mapping of the distances of secondary craters from their primary crater on the Moon, Mars, and Mercury indicates a unified power law relationship, regardless of gravity and target properties and suggests the minimum impact velocity is lower than expected.
撞击喷出物形成次级陨石坑(次级)的最小速度(v)仍然是个谜,但它是解开行星表面撞击喷出物命运的一个关键参数。通过对月球、火星和水星上不同大小(D)的主陨石坑(原陨石坑)中心到最近的次级陨石坑的距离(L)进行编目,我们发现 v 可以小到 ~25 m/s,而统一的幂律关系 L = 1.86D0.93(单位均为米)适用于简单和复杂的陨石坑,与不同的表面重力和目标特性无关。这一关系也成功地预测了金星上陨石坑所形成的次级陨石坑的出现。对 v 的限制解释了陨石坑壁结构扰动和同源喷出物着陆造成的连续喷出物沉积的常见现象,表明形成自次级的喷出物不需要接近垂直的喷射角,三级陨石坑在陆地天体上应该非常多。对月球、火星和水星上次级陨石坑与其初级陨石坑距离的测绘表明,无论重力和目标特性如何,都存在统一的幂律关系,并表明最小撞击速度比预期的要低。
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引用次数: 0
Phenological response to climatic change depends on spring warming velocity 对气候变化的物候反应取决于春季变暖速度
IF 8.1 1区 地球科学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2024-10-28 DOI: 10.1038/s43247-024-01807-8
Robert Guralnick, Theresa Crimmins, Erin Grady, Lindsay Campbell
Climatic change is dramatically altering phenology but generalities regarding tempo and mode of response remain limited. Here we present a general model framework incorporating spring temperature, velocity of spring warming, and species’ thermal requirements for predicting phenological response to warming. A key prediction of this framework is that species active earlier in the season and located in warmer regions where spring temperature velocity is lowest show strongest sensitivity to climatic change and greatest advancement in response to warming. We test this prediction using plant phenology datasets collected in the 1850s and 2010s. Our results strikingly confirm model predictions, showing that while temperature sensitivity is higher in regions with low temperature velocity, the greatest realized change in phenological onset is northern areas where warming rates have been fastest. Our framework offers enhanced utility for predicting phenological sensitivity and responsiveness in temperate regions and across multiple plant species and potentially other groups. Spring temperature velocity impacts cycles of plant flowering and leaf-out, and realized change is greatest in areas where warming is most rapid, according to a model framework tested against Eastern USA plant phenology data.
气候变迁正在极大地改变物候,但有关反应速度和模式的一般性结论仍然有限。在此,我们提出了一个包含春季温度、春季升温速度和物种热需求的一般模型框架,用于预测物种对气候变暖的物候反应。该框架的一个关键预测是,在春季气温升高速度最低的温暖地区,在季节早期活跃的物种对气候变化的敏感性最强,对气候变暖的反应速度也最快。我们利用 19 世纪 50 年代和 2010 年代收集的植物物候数据集检验了这一预测。我们的结果惊人地证实了模型的预测,表明虽然低温速度地区对温度的敏感性更高,但气候变暖速度最快的北部地区物候期开始时的变化最大。我们的框架为预测温带地区、多种植物物种以及潜在的其他物种群的物候敏感性和响应性提供了更强的实用性。根据美国东部植物物候数据测试的模型框架,春季气温速度会影响植物开花和落叶的周期,在气候变暖速度最快的地区,物候变化最大。
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引用次数: 0
Deglaciation in the subtropical Andes has led to a peak in sediment delivery 亚热带安第斯山脉的退化导致沉积物输送量达到高峰
IF 8.1 1区 地球科学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2024-10-26 DOI: 10.1038/s43247-024-01815-8
Iván Vergara, René Garreaud, Ian Delaney, Álvaro Ayala
Glaciers are thinning and retreating as climate warms, thus eroding less of the Earth’s surface. However, other hydrological factors in glacierized catchments are likely producing a transient increase in sediment delivery, resulting in ‘peak sediment’. Estimating the trajectory of the peak sediment is ecologically and socially important but scientifically challenging because of the delayed and non-linear response of glacier sediment export to climate forcing. This study used time series of suspended sediment concentration starting in the 1960s from 11 Andean rivers at subtropical latitudes to analyse past changes in sediment export and infer its future behaviour. The recent decade has experienced anomalously high sediment concentration in most glacierized catchments, but the 1970s experienced even higher values. Decadal variations in the relationship between sediment concentration and ice melt suggest that the magnitude of the current decade was lower due to reduced glacial sediment rather than other factors. Combining this result with the fact that glacial runoff is decreasing, it is inferred that, for most of the glacierized catchments, the peak sediment generated by the anthropogenic deglaciation started two centuries ago has already passed its maximum. The sediment delivery product of climate-change-driven deglaciation has passed its maximum for most of the subtropical Andes, according to the analysis of suspended sediment concentration from 11 rivers at subtropical latitudes.
随着气候变暖,冰川正在变薄和后退,因此对地球表面的侵蚀也在减少。然而,冰川化集水区的其他水文因素可能会造成沉积物输送量的短暂增加,从而形成 "沉积物峰值"。估算沉积物峰值的轨迹在生态和社会方面具有重要意义,但在科学上却具有挑战性,因为冰川沉积物输出对气候胁迫具有延迟和非线性响应。这项研究利用从 20 世纪 60 年代开始的时间序列,对亚热带纬度地区 11 条安第斯河流的悬浮沉积物浓度进行分析,以了解沉积物输出的过去变化并推断其未来行为。最近十年,大多数冰川化流域的沉积物浓度异常高,但 20 世纪 70 年代的数值更高。沉积物浓度与冰融化之间关系的十年变化表明,当前十年的沉积物浓度较低是由于冰川沉积物减少而非其他因素造成的。将这一结果与冰川径流正在减少的事实相结合,可以推断出,对于大多数冰川化流域来说,两个世纪前开始的人为冰川退化所产生的沉积物峰值已经超过了其最大值。根据对亚热带纬度 11 条河流的悬浮沉积物浓度的分析,在亚热带安第斯山脉的大部分地区,气候变化导致的冰川消融所产生的沉积物已经超过了其最大值。
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引用次数: 0
Enhanced stratosphere-troposphere and tropics-Arctic couplings in the 2023/24 winter 2023/24 年冬季平流层-对流层和热带-北极耦合的增强
IF 8.1 1区 地球科学 Q1 ENVIRONMENTAL SCIENCES Pub Date : 2024-10-26 DOI: 10.1038/s43247-024-01812-x
Lu Qian, Jian Rao, Rongcai Ren, Chunhua Shi, Siming Liu
The stratosphere-troposphere and the tropics-Arctic couplings were intermittently enhanced in the 2023/24 winter. Here we used ERA5 reanalysis data and found that due to the amplification of planetary wavenumber 1 and 2 pulses, three displacement-type sudden stratospheric warming events occurred in one winter under the background conditions of warming equatorial middle and east Pacific, active equatorial convections, and easterly stratospheric equatorial winds. During the sudden stratospheric warming events, the stratospheric disturbances propagated downward to the surface, followed by continental cold surges. The residual meridional circulation was strengthened across the tropics and Arctic, anomalously more water vapor was transported into the stratosphere in tropics, while ozone content diminished in the lower stratosphere and grew in the upper stratosphere over the tropics. Meanwhile, water vapor and ozone over the Arctic exhibited a dipping pattern from the upper to the lower stratosphere. In early 2024, three sudden stratospheric warming events occurred due to warming equatorial middle and east Pacific, active equatorial convections, and easterly equatorial winds, enhancing stratosphere- troposphere and tropics-Arctic coupling, according to analysis of zonal wind, temperature, and geopotential height from ERA5 reanalysis data.
平流层-对流层和热带-北极耦合在2023/24年冬季间歇性增强。在此,我们利用ERA5再分析数据发现,在赤道中东太平洋变暖、赤道对流活跃、平流层赤道偏东风的背景条件下,由于行星波1和2脉冲的放大作用,一个冬季发生了三次位移型平流层骤暖事件。在平流层骤暖事件期间,平流层扰动向下传播到地表,随后出现大陆冷涌。热带和北极地区的残余经向环流加强,热带地区有异常多的水汽被输送到平流层,而热带地区平流层下层的臭氧含量减少,平流层上层的臭氧含量增加。同时,北极上空的水汽和臭氧呈现出从平流层上层向下层下降的模式。根据对ERA5再分析数据中的带风、温度和位势高度的分析,2024年初,由于赤道中、东太平洋变暖、赤道对流活跃和赤道东风的影响,发生了三次平流层突然变暖事件,增强了平流层-对流层和热带-北极的耦合。
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引用次数: 0
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