共查询到20条相似文献，搜索用时 906 毫秒
1.
The study analyzes the recently summarized data on surface air temperature in the east of North America, in Western and Eastern Europe, and in India before and after the Tambora volcano eruption occurred in Indonesia in 1815. The well-known fact is proved that no cooling occurred after the Tambora eruption in the east of Europe and in India. It is found that the insignificant (at the decadal timescale) cooling was observed in all analyzed regions: it started earlier than the Tambora eruption and than the stronger eruption of another volcano in 1809. The paper demonstrates that it is impossible to reveal cause-effect relations between the general cooling and the eruption of the above volcanoes based on the available data on surface air temperature. Cold snaps that follow the later volcanic eruptions were identified by meteorologists using the data of the whole network of meteorological observations established in the second half of the 19th century. However, these cold snaps cannot be detected using data on surface air temperature only. 相似文献
2.
Dan Zhang Richard Blender Klaus Fraedrich 《Theoretical and Applied Climatology》2013,111(3-4):437-454
The impacts and cooperative effects of volcanic eruptions and ENSO (El Niño/Southern Oscillation) are analyzed in a millennium simulation for 800–2005 AD using the earth system model (ESM) ECHAM5/MPIOM/JSBACH subject to anthropogenic and natural forcings. The simulation comprises two ensembles, a first with weak (E1, five members) and a second with strong (E2, three members) variability total solar irradiance. In the analysis, the 21 most intense eruptions are selected in each ensemble member. Volcanoes with neutral ENSO states during two preceding winters cause a global cooling in the year after eruptions up to ?2.5°C. The nonsignificant positive values in the tropical Pacific Ocean indicate an El Niño-like warming. In the winter after an eruption, warming is mainly found in the Arctic Ocean and the Bering Sea in E2 warming extends to Siberia and central Asia. The recovery times for the volcano-induced cooling (average for 31 eruptions) vary globally between 1 and 12 years. There is no significant increase of El Niño events after volcanic eruptions in both ensembles. The simulated temperature and the drought indices are compared with corresponding reconstructions in East Asia. Volcanoes cause a dramatic cooling in west China (?2°C) and a drought in East China during the year after the eruption. The reconstructions show similar cooling patterns with smaller magnitudes and confirm the dryness in East China. Without volcanoes, El Niño events reduce summer precipitation in the North, while South China becomes wetter; La Niña events cause opposite effects. El Niño events in the winters after eruptions compensate the cooling caused by volcanoes in most regions of China (consistent with reconstructions), while La Niña events intensify the cooling (up to ?2.5°C). The simulated and reconstructed drought indices show tripole patterns which are altered by El Niño events. The simulated impact of the Tambora eruption in 1815, which caused the “year without summer” of 1816 in Europe and North America and led to coldness and famines in the Chinese province Yunnan, depends crucially on the ENSO state of the coupled model. A comparison with reconstructed El Niño events shows a moderate cool climate with wet (in the south) and extreme dry anomalies (in the north) persisting for several years. 相似文献
3.
4.
近50年火山喷发和太阳活动对我国气候影响的研究 总被引：8，自引：1，他引：8
利用特征向量分析与时序叠加分析和谱分析相结合的方法，分析了近50a来我国地面气温和降水场中火山喷发和太阳活动的气候信号，强烈的火山喷发导致全国大部分地区降温，喷发1a多以后降温最明显，并能持续约半年。除这个主信号以外，青藏高原、东南沿海和东北地区都可能出现较为复杂的温度变化，温度变化与太阳活动之间的联系更多地反映在二者的振荡关系上。在降水场中的火山信号较弱，表现为火山喷发后的秋冬季节南方地区降水偏多。在青藏高原积雪和深层地温的变化中，没有发现火山和太阳活动信号。 相似文献
5.
Volcanic Dry Fogs, Climate Cooling, and Plague Pandemics in Europe and the Middle East 总被引：2，自引：0，他引：2
Richard B. Stothers 《Climatic change》1999,42(4):713-723
Dry fogs spawned by large volcanic eruptions cool the climate by partially blocking incident sunlight and perturbing atmospheric circulation patterns. The climatic and epidemiological consequences of seven intense volcanic dry fogs of the past 21 centuries, detected in Europe and the Middle East, are investigated by using historical reports, supplemented by tree-ring data and polar-ice acidity measurements. The signal-to-noise ratio in the historical data is very high. In four cases, the first winter following the eruption was exceptionally cold. The eruptions preceding these frigid first winters are known, or strongly suspected, to have occurred at high northern latitudes. Two of the other dry fogs are linked unambiguously to tropical eruptions, after each of which the first winter was comparatively mild. The following few years tended to be cooler on the average in all six of the instances that can be checked. Famine and disease pandemics ensued, with the epidemics in all cases reaching the Mediterranean area within 1 to 5 years after the eruptions. In at least five cases, the contagion responsible for the mass mortality was probably plague. 相似文献
6.
1980年夏季我国天气气候反常和St.Helens火山爆发的影响 总被引：3，自引：0，他引：3
1980年5月18日St.Helens火山大爆发,大量火山灰喷入平流层,围绕北半球中纬度带飘浮。在30°N以北我国东部各站晴空直接辐射量(S)从6月上旬开始异常偏低,夏季S达到近二十余年来的最低值,夏季中纬度S的经向梯度异常增大;相应地,西太平洋副高及北侧的季风雨带在7—8月异常偏南,形成了我国严重的北旱南涝以及江淮冷夏等反常天气气候。本文现就此作物理分析。 相似文献
7.
This study focuses on one of the most interesting times of the early instrumental period in northwest Europe (from 1730–1745)
attempting to place the extremely cold year of 1740 and the unusual warmth of the 1730s decade in a longer context. The similarity
of the features in the few long (and independent) instrumental records together with extensive documentary evidence clearly
indicates that remarkable climatic changes occurred rapidly in this period. We use unpublished subjective circulation charts
developed by the late Hubert Lamb, to assist in understanding the course of events, particularly during the extreme year of
1740 and the four subsequent years. We also compare these subjective charts with others recently developed using more objective
modern reconstruction techniques. Apart from evidence of a reduction in the number of explosive volcanic eruptions following
the 1690s, it is difficult to explain the changes in terms of our knowledge of the possible factors that have influenced this
region during the 19th and 20th centuries. The study, therefore, highlights how estimates of natural climatic variability
in this region based on more recent data may not fully encompass the possible known range. 相似文献
8.
9.
Global hydroclimatic changes from 1950 to 2018 are analyzed using updated data of land precipitation, streamflow, and an improved form of the Palmer Drought Severity Index. The historical changes are then compared with climate model-simulated response to external forcing to determine how much of the recent change is forced response. It is found that precipitation has increased from 1950 to 2018 over mid-high latitude Eurasia, most North America, Southeast South America, and Northwest Australia, while it has decreased over most Africa, eastern Australia, the Mediterranean region, the Middle East, and parts of East Asia, central South America, and the Pacific coasts of Canada. Streamflow records largely confirm these precipitation changes. The wetting trend over Northwest Australia and Southeast South America is most pronounced in austral summer while the drying over Africa and wetting trend over mid-high latitude Eurasia are seen in all seasons. Coupled with the drying caused by rising surface temperatures, these precipitation changes have greatly increased the risk of drought over Africa, southern Europe, East Asia, eastern Australia, Northwest Canada, and southern Brazil. Global land precipitation and continental freshwater discharge show large interannual and inter-decadal variations, with negative anomalies during El Niño and following major volcanic eruptions in 1963, 1982, and 1991; whereas their decadal variations are correlated with the Interdecadal Pacific Oscillation (IPO) with IPO’s warm phase associated with low land precipitation and continental discharge. The IPO and Atlantic multidecadal variability also dominate multidecadal variations in land aridity, accounting for 90 % of the multidecadal variance. CMIP5 multi-model ensemble mean shows decreased precipitation and runoff and increased risk of drought during 1950–2018 over Southwest North America, Central America, northern and central South America (including the Amazon), southern and West Africa, the Mediterranean region, and Southeast Asia; while the northern mid-high latitudes, Southeast South America, and Northwest Australia see increased precipitation and runoff. The consistent spatial patterns between the observed changes and the model-simulated response suggest that many of the observed drying and wetting trends since 1950 may have resulted at least partly from historical external forcing. However, the drying over Southeast Asia and wetting over Northwest Australia are absent in the 21st century projections.
相似文献10.
Richard B. Stothers 《Climatic change》1998,39(4):715-726
At the end of Iceland's settlement period in the 10th century, a great basalt fissure eruption known as Eldgjá (Fire Chasm) occurred near the southern settlements and destroyed a portion of them. This lava outpouring was one of the two largest terrestrial fissure eruptions of the last 11 centuries. Historical documents from Iceland, western Europe, and the Middle East are used to trace the eruption's possible climatic and demographic consequences. The cloud of aerosols from the eruption, traversing northern Europe, dimmed and reddened the Sun. There followed a very cold winter, famine, and a widespread disease epidemic during the next year and, again, 5 to 7 years after the eruption, probably as a result of the long-lived stratospheric aerosol veil. Convergent lines of evidence point to 934 as the year of the eruption. Accordingly, it becomes possible to date within a year a prominent acid horizon in ice laid down in central Greenland and, tentatively, to interpret some critical events and dates in early Icelandic history. 相似文献
11.
Climate extremes, particularly the droughts sustaining over a prolonged period and affecting extended area (defined as “exceptional drought events”), can have long-lasting effects on economic and social activities. Here we use the Chinese drought/flood proxy data of the past five hundred years to identify the cases of exceptional drought events over eastern China (east of 105°E), and to study their spatial patterns and temporal evolutions. The associated circulations for the contemporary case are analyzed using available meteorological data. Possible linkage of these cases to climatic forcing and natural climate events is also explored. After considering the intensity, duration, and spatial coverage, we identified three exceptional drought events, which occurred in 1586–1589, 1638–1641, and 1965–1966 in chronological order. They were the most severe droughts of last five centuries in eastern China, with more than 40% of affected area and the drought center encountered a significant summer rainfall reduction (about 50% or more). These three droughts all developed first in North China (34–40°N), and then either expanded southward or moved to the Yangtze River Valley (27–34°N) and the northern part of the southeastern coastal area (22–27°N). For the 1965–1966 case, the significant reduction of summer precipitation was caused by a weakening of summer monsoon and an anomalous westward and northward displacement of the western Pacific subtropical high. Our analyses also suggest that these three exceptional drought events might be triggered by large volcanic eruptions and amplified by both volcanic eruptions and El Niño events. 相似文献
12.
Large volcanic eruptions, in addition to the well-known effect of producing global cooling for a year or two, have been observed to produce shorterterm responses in the climate system involving non-linear dynamical processes. In this study, we use the ECHAM2 general circulation model forced with stratospheric aerosols to test some of these ideas. Run in a perpetual-January mode, with tropical stratospheric heating from the volcanic aerosols typical of the 1982 El Chichón eruption or the 1991 Pinatubo eruption, we find a dynamical response with an increased polar night jet in the Northern Hemisphere (NH) and stronger zonal winds which extend down into the troposphere. The Azores High shifts northward with increased tropospheric westerlies at 60°N and increased easterlies at 30°N. Surface temperatures are higher both in northern Eurasia and North America, in agreement with observations for the NH winters of 1982–83 and 1991–92 as well as the winters following the other 10 largest volcanic eruptions since 1883.This paper was presented at the Second International Conference on Modelling of Global Climate Variability, held in Hamburg 7–11 September 1992 under the auspices of the Max Planck Institute for Meteorology. Guest Editor for these papers is L. Dümenil 相似文献
13.
为揭示造成火山强迫气候响应模拟不确定性的原因,第六次国际耦合模式比较计划（CMIP6）设立了火山强迫的气候响应模拟比较计划（VolMIP)。该计划由基于历史火山爆发的理想火山扰动试验组成,包括三组主要的试验：第一组关注短期（季节至年际）大气动力响应;第二组关注海气耦合系统的长期（年际至年代际）响应;第三组关注气候系统对火山群的响应。VolMIP旨在通过给定相同的辐射强迫并进行多成员集合模拟,揭示模式对外强迫响应的不确定性,通过设定不同的背景气候态,阐明内部变率和外强迫对气候响应的相对贡献。 相似文献
14.
Richard B. Stothers 《Climatic change》2000,45(2):361-374
Somewhere in the tropics, a volcanoexploded violently during the year 1258, producing amassive stratospheric aerosol veil that eventuallyblanketed the globe. Arctic and Antarctic ice coressuggest that this was the world's largest volcaniceruption of the past millennium. According tocontemporary chronicles, the stratospheric dry fogpossibly manifested itself in Europe as a persistentlycloudy aspect of the sky and also through anapparently total darkening of the eclipsed Moon. Basedon a sudden temperature drop for several months inEngland, the eruption's initiation date can beinferred to have been probably January 1258. Thefrequent cold and rain that year led to severe cropdamage and famine throughout much of Europe.Pestilence repeatedly broke out in 1258 and 1259; itoccurred also in the Middle East, reportedly there asplague. Another very cold winter followed in1260–1261. The troubled period's wars, famines,pestilences, and earthquakes appear to havecontributed in part to the rise of the Europeanflagellant movement of 1260, one of the most bizarresocial phenomena of the Middle Ages. Analogies can bedrawn with the climatic aftereffects and Europeansocial unrest following another great tropicaleruption, Tambora in 1815. Some generalizations aboutthe climatic impacts of tropical eruptions are madefrom these and other data. 相似文献
15.
This study presents the first 19th century cold season climate chronology for the Kingdom of Lesotho in southern Africa. The
chronology is constructed using a variety of documentary sources including letters, diaries, reports, monographs and newspaper
articles obtained from southern African and British archives. Information relating to cold season weather phenomena during
the austral autumn, winter and early spring months were recorded verbatim. Each of the cold seasons from 1833 to 1900 was
then classified as “very severe”, “severe” or “normal/mild”, with a confidence rating ranging from low (1) to high (3) awarded
against each annual classification. The accuracy of the document-derived chronology was verified against temperature data
for Maseru for the period 1893–1900. Excellent correspondence of the document-derived chronology with the Maseru instrumental
data and also with other global proxy temperature records for the 19th century is achieved. The results indicate 12 (18% of
the total) very severe, 16 (23%) severe and 40 (59%) normal/mild cold seasons between 1833 and 1900. The overall trend is
for more severe and snow-rich cold seasons during the early part of the study period (1833–1854) compared with the latter
half of the 19th century (with the exception of the 1880s). A reduction in the duration of the frost season by over 20 days
during the 19th century is also tentatively identified. Several severe to very severe cold seasons in Lesotho follow after
major tropical and SH volcanic eruptions; such years are usually characterized by early frosts, and frequent and heavy snowfalls.
The blocking of solar radiation and the enhanced northward displacement of polar fronts that are directly or indirectly associated
with volcanic events, may account for many of the most severe Lesotho winters during the 19th century. 相似文献
16.
2006年全球重大天气气候事件概述 总被引：4，自引：0，他引：4
2006年，全球气候持续偏暖，是有器测气象记录以来的第六暖年。一次厄尔尼诺事件于2006年8月开始形成。1月，强寒潮和暴风雪袭击欧洲大部地区和日本。夏季，美国和欧洲的大部地区，中国局部地区均遭遇高温热浪天气。年内，全球各地遭受不同程度的干旱和洪涝灾害，其中美国南部和澳大利亚东南部出现严重干旱，东非地区先旱后涝，亚洲南部和南美西北部暴雨频繁。2006年，西北太平洋热带风暴和台风活动频次较常年偏少，但具有强度强、影响范围广、灾害重的特点。2006年，大西洋飓风期的热带风暴活动次数接近历史同期水平，北太平洋东部飓风期的热带风暴活动次数超过历史同期水平。 相似文献
17.
2011年极端天气和气候事件及其他相关事件的概要回顾 总被引：1，自引：1，他引：0
2011年世界各地极端天气事件频发。1月,朝鲜半岛经历1945年来最长的寒潮天气;同期,强暴风雪袭击美国,1亿人受影响;4月8日,持续干旱大风导致德国北部小镇遭遇沙尘暴;7～10月的季风强降水致使泰国遭遇自1942年以来最严重的洪灾;高温少雨致使东非地区、南美洲地区的古巴经历严重干旱;9月北极海冰的体积达历史最小。5～9月,我国平均高温日数为1961年以来历史同期次多,多地刷新高温历史极值;2011年我国平均年降水量创60年来最低,多地遭遇严重干旱;而华西和黄淮经历异常严重秋汛。 相似文献
18.
Seasonal and annual temperature reconstructions derived from western North American semi-arid site tree-ring chronologies are used to examine the possible spatial response of North American climate to volcanic eruptions within the period 1602 to 1900. Low-latitude eruptions appear to give the strongest response. Cooling of the annual average temperatures in the central and eastern United States is reconstructed to follow volcanic eruptions with warming in the western states. The magnitude and spatial extent of the reconstructed cooling and warming varies seasonally. The warming that occurs in the west is strongest and most extensive in winter while the cooling in the east is most marked in summer. These results are based on reconstructed climate records which contain error terms unrelated to climatic factors. The suggested pattern of response to volcanic forcing is, however, supported by four independent temperature/proxy temperature series within the area of the temperature reconstructions. Additional support is provided by three independent series lying outside the area which suggest that the temperature spatial response may extend to the north beyond the area covered by the tree-ring reconstructions. 相似文献
19.
A 600-year integration performed with the Bergen Climate Model and National Centers for Environmental Prediction/National Center for Atmospheric Research （NCEP/NCAR） reanalysis data were used to investigate the impact of strong tropical volcanic eruptions on the East Asian summer monsoon （EASM） and EASM rainfall.Both the simulation and NCEP/NCAR reanalysis data show a weakening of the EASM in strong eruption years.The model simulation suggests that North and South China experience droughts and the Yangtze-Huaihe River Valley experiences floods during eruption years.In response to strong tropical volcanic eruptions,the meridional air temperature gradient in the upper troposphere is enhanced,which leads to a southward shift and an increase of the East Asian subtropical westerly jet stream （EASWJ）.At the same time,the land-sea thermal contrast between the Asian land mass and Northwest Pacific Ocean is weakened.The southward shift and increase of the EASWJ and reduction of the land-sea thermal contrast all contribute to a weakening of the EASM and EASM rainfall anomaly. 相似文献
20.
Meng ZUO Tianjun ZHOU Wenmin MAN Xiaolong CHEN Jian LIU Fei LIU Chaochao GAO 《大气科学进展》2022,39(12):1986-1993
An undersea volcano at Hunga Tonga-Hunga Ha'apai (HTHH) near the South Pacific island nation of Tonga, erupted violently on 15 January 2022. Potential climate impact of the HTHH volcanic eruption is of great concern to the public; here, we intend to size up the impact of the HTHH eruption from a historical perspective. The influence of historical volcanic eruptions on the global climate are firstly reviewed, which are thought to have contributed to decreased surface temperature, increased stratospheric temperature, suppressed global water cycle, weakened monsoon circulation and El Ni?o-like sea surface temperature. Our understanding of the impacts of past volcanic eruptions on global-scale climate provides potential implication to evaluate the impact of the HTHH eruption. Based on historical simulations, we estimate that the current HTHH eruption with an intensity of 0.4 Tg SO2 injection will decrease the global mean surface temperature by only 0.004°C in the first year after eruption, which is within the amplitude of internal variability at the interannual time scale and thus not strong enough to have significant impacts on the global climate. 相似文献