Formation and Evolution of Luyang Lake Wetland

2013 ◽  
Vol 773 ◽  
pp. 852-856
Author(s):  
Ju Hua Yang ◽  
Min Xi ◽  
Jian Min Wu
Keyword(s):  
Ming Dynasty ◽  
Global Climate ◽  
Water Source ◽  
Water Area ◽  
Early Pleistocene ◽  
Quaternary Period ◽  
The Past ◽  
Formation And Evolution ◽  
The Late Ming Dynasty ◽  
Artificial Water

The Luyang Lake, a declined ancient lake, is located in Lubotan area in northeast of Shaanxi Guanzhong Plain. As one of the relict lakes of Sanmen Lake in early Pleistocene, Luyang Lake formed in the Pleistocene of Quaternary period dating back to about 3 million years ago, and later gradually retreat into a beach in the late Ming dynasty due to crustal tectonics and global climate change. Water area of the lakes becomes larger due to development of irrigation systems and artificial water source in the past 30 years. And now, the groundwater level is rising and Wetland trend intensifying.

scholarly journals Asian inland wildfires driven by glacial–interglacial climate change

2020 ◽  
Vol 117 (10) ◽  
pp. 5184-5189 ◽  
Author(s):  
Yongming Han ◽  
Zhisheng An ◽  
Jennifer R. Marlon ◽  
Raymond S. Bradley ◽  
Changlin Zhan ◽  
...  
Keyword(s):  
High Intensity ◽  
Large Scale ◽  
Global Climate ◽  
Chinese Loess Plateau ◽  
Potential Importance ◽  
Quaternary Period ◽  
Chinese Loess ◽  
Ice Volume ◽  
The Past ◽  
The Chinese Loess Plateau

Wildfire can influence climate directly and indirectly, but little is known about the relationships between wildfire and climate during the Quaternary, especially how wildfire patterns varied over glacial–interglacial cycles. Here, we present a high-resolution soot record from the Chinese Loess Plateau; this is a record of large-scale, high-intensity fires over the past 2.6 My. We observed a unique and distinct glacial–interglacial cyclicity of soot over the entire Quaternary Period synchronous with marine δ18O and dust records, which suggests that ice-volume-modulated aridity controlled wildfire occurrences, soot production, and dust fluxes in central Asia. The high-intensity fires were also found to be anticorrelated with global atmospheric CO2 records over the past eight glacial–interglacial cycles, implying a possible connection between the fires, dust, and climate mediated through the iron cycle. The significance of this hypothetical connection remains to be determined, but the relationships revealed in this study hint at the potential importance of wildfire for the global climate system.

Meteorological History and Historical Climate of China

2018 ◽  
Author(s):  
Jie Fei
Keyword(s):  
Ming Dynasty ◽  
Central Government ◽  
Volcanic Eruptions ◽  
Precipitation Variability ◽  
Ice Age ◽  
Shang Dynasty ◽  
Meteorological Observation ◽  
The Qing Dynasty ◽  
The Past ◽  
The Late Ming Dynasty

The Chinese meteorological records could be traced back to the oracle-bone inscriptions of the Shang Dynasty (c. 1600 bc–c. 1046 bc). For the past 3,000 years, continuous meteorological records are available in official histories, chronicles, local gazetteers, diaries, and other historical materials. Ever since the Qin Dynasty (221–207 bc), precipitation reports to the central government were officially organized; however, only those of the Qing Dynasty (1644–1912 ad) are extant, and they have been widely used to reconstruct precipitation variability.Modern meteorological knowledge began to be introduced in China during the late Ming Dynasty (1368–1644 ad). Modern meteorological observation possibly began in the 17th century, whereas continuous meteorological observation records go back to the mid-19th century.Previous researches have reconstructed the chronologies of the temperature change in China during the past 2,000 years, and the Medieval Warm Period and Little Ice Age were identified. With regard to precipitation variability, yearly charts of dryness/wetness in China for the past 500 years were produced. Several chronologies of dust storm, plum rain (Meiyu), and typhoon were also established. Large volcanic eruptions resulted in short scale abrupt cooling in China during the past 2,000 years. Climatic change was significantly related to the war occurrences and dynastic cycles in historical China.

scholarly journals On the Female Images in Feng Menglong's "Three Volumes of Stories"

2021 ◽  
Vol 2 (5) ◽  
Author(s):  
Xiaoyue Lai
Keyword(s):  
Ming Dynasty ◽  
Female Images ◽  
The Past ◽  
The Enlightenment ◽  
Late Ming ◽  
The Common ◽  
Late Ming Dynasty ◽  
The Late Ming Dynasty ◽  
Common Destiny

Feng Menglong’s "Three Volumes of Stories" involves many female images. "Being bought and sold at arbitrarily" was the common destiny of women in that period; "cheating for love" was a new love choice made by women under the influence of the Enlightenment in the late Ming Dynasty; "getting married" can be said to be the resistance of women who were forced to fall in the past dynasties to their fate.

scholarly journals Global climatology and trends in convective environments from ERA5 and rawinsonde data

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Mateusz Taszarek ◽  
John T. Allen ◽  
Mattia Marchio ◽  
Harold E. Brooks
Keyword(s):  
Large Scale ◽  
Climate Models ◽  
Global Climate ◽  
Convective Available Potential Energy ◽  
Global Climate Models ◽  
Convective Precipitation ◽  
The Past ◽  
The Tropics ◽  
Rawinsonde Data

AbstractGlobally, thunderstorms are responsible for a significant fraction of rainfall, and in the mid-latitudes often produce extreme weather, including large hail, tornadoes and damaging winds. Despite this importance, how the global frequency of thunderstorms and their accompanying hazards has changed over the past 4 decades remains unclear. Large-scale diagnostics applied to global climate models have suggested that the frequency of thunderstorms and their intensity is likely to increase in the future. Here, we show that according to ERA5 convective available potential energy (CAPE) and convective precipitation (CP) have decreased over the tropics and subtropics with simultaneous increases in 0–6 km wind shear (BS06). Conversely, rawinsonde observations paint a different picture across the mid-latitudes with increasing CAPE and significant decreases to BS06. Differing trends and disagreement between ERA5 and rawinsondes observed over some regions suggest that results should be interpreted with caution, especially for CAPE and CP across tropics where uncertainty is the highest and reliable long-term rawinsonde observations are missing.

Modulation of the relationship between summer temperatures in the Qinghai–Tibetan Plateau and Arctic over the past millennium by external forcings

2021 ◽  
pp. 1-9
Author(s):  
Feng Shi ◽  
Anmin Duan ◽  
Qiuzhen Yin ◽  
John T Bruun ◽  
Cunde Xiao ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Global Climate ◽  
Volcanic Eruptions ◽  
Warm Period ◽  
Temperature Correlation ◽  
The Past ◽  
External Forcings ◽  
Centennial Variation ◽  
Summer Temperatures ◽  
Past Millennium

Abstract The Qinghai–Tibetan Plateau and Arctic both have an important influence on global climate, but the correlation between climate variations in these two regions remains unclear. Here we reconstructed and compared the summer temperature anomalies over the past 1,120 yr (900–2019 CE) in the Qinghai–Tibetan Plateau and Arctic. The temperature correlation during the past millennium in these two regions has a distinct centennial variation caused by volcanic eruptions. Furthermore, the abrupt weak-to-strong transition in the temperature correlation during the sixteenth century could be analogous to this type of transition during the Modern Warm Period. The former was forced by volcanic eruptions, while the latter was controlled by changes in greenhouse gases. This implies that anthropogenic, as opposed to natural, forcing has acted to amplify the teleconnection between the Qinghai–Tibetan Plateau and Arctic during the Modern Warm Period.

scholarly journals Ensemble models on palaeoclimate to predict India's groundwater challenge

2013 ◽  
Vol 2 (3) ◽  
Author(s):  
Partha Sarathi Datta
Keyword(s):  
Climate Change ◽  
Climate Models ◽  
Global Climate ◽  
Global Climate Models ◽  
Humid Climate ◽  
Ensemble Models ◽  
North West ◽  
The Past ◽  
The North ◽  
14C Age

In many parts of the world, freshwater crisis is largely due to increasing water consumption and pollution by rapidly growing population and aspirations for economic development, but, ascribed usually to the climate. However, limited understanding and knowledge gaps in the factors controlling climate and uncertainties in the climate models are unable to assess the probable impacts on water availability in tropical regions. In this context, review of ensemble models on δ18O and δD in rainfall and groundwater, 3H- and 14C- ages of groundwater and 14C- age of lakes sediments helped to reconstruct palaeoclimate and long-term recharge in the North-west India; and predict future groundwater challenge. The annual mean temperature trend indicates both warming/cooling in different parts of India in the past and during 1901–2010. Neither the GCMs (Global Climate Models) nor the observational record indicates any significant change/increase in temperature and rainfall over the last century, and climate change during the last 1200 yrs BP. In much of the North-West region, deep groundwater renewal occurred from past humid climate, and shallow groundwater renewal from limited modern recharge over the past decades. To make water management to be more responsive to climate change, the gaps in the science of climate change need to be bridged.

scholarly journals Changes in the strength and width of the Hadley Circulation since 1871

2012 ◽  
Vol 8 (4) ◽  
pp. 1169-1175 ◽  
Author(s):  
J. Liu ◽  
M. Song ◽  
Y. Hu ◽  
X. Ren
Keyword(s):  
20Th Century ◽  
Global Climate ◽  
Hadley Circulation ◽  
Recent Change ◽  
Early 20Th Century ◽  
Greenhouse Warming ◽  
Long Period ◽  
The Past ◽  
Period Oscillation

Abstract. Recent studies demonstrate that the Hadley Circulation has intensified and expanded for the past three decades, which has important implications for subtropical societies and may lead to profound changes in global climate. However, the robustness of this intensification and expansion that should be considered when interpreting long-term changes of the Hadley Circulation is still a matter of debate. It also remains largely unknown how the Hadley Circulation has evolved over longer periods. Here, we present long-term variability of the Hadley Circulation using the 20th Century Reanalysis. It shows a slight strengthening and widening of the Hadley Circulation since the late 1970s, which is not inconsistent with recent assessments. However, over centennial timescales (1871–2008), the Hadley Circulation shows a tendency towards a more intense and narrower state. More importantly, the width of the Hadley Circulation might have not yet completed a life-cycle since 1871. The strength and width of the Hadley Circulation during the late 19th to early 20th century show strong natural variability, exceeding variability that coincides with global warming in recent decades. These findings raise the question of whether the recent change in the Hadley Circulation is primarily attributed to greenhouse warming or to a long-period oscillation of the Hadley Circulation – substantially longer than that observed in previous studies.

Late-Holocene Formation of Lake Michigan Beach Ridges Correlated with a 70-yr Oscillation in Global Climate

1996 ◽  
Vol 45 (3) ◽  
pp. 321-326 ◽  
Author(s):  
Paul A. Delcourt ◽  
William H. Petty ◽  
Hazel R. Delcourt
Keyword(s):  
Late Holocene ◽  
Lake Michigan ◽  
Global Climate ◽  
Temperature Oscillation ◽  
Beach Ridges ◽  
Climate Fluctuations ◽  
The Past ◽  
Fundamental Part ◽  
Atmosphere System ◽  
Centennial Time Scale

AbstractA radiocarbon-dated series of 75 beach ridges, formed at regular intervals averaging 72 yr over the past 5400 yr, provides further support for the existence of a 70-yr oscillation in Northern Hemisphere climate, postulated recently from instrument data representing less than two cycles of this climate oscillation. Results from this study lend support to the interpretation that internal variations in the ocean–atmosphere system are an important factor in climate fluctuations on a decadal–centennial time scale. A temperature oscillation with a period of about 70 yr has been a previously unrecognized but fundamental part of the global climate system since at least the middle Holocene.

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