Spatial variability and long-term change in pollen diversity in Nam Co catchment (central Tibetan Plateau): Implications for alpine vegetation restoration from a paleoecological perspective

2017 ◽  
Vol 61 (3) ◽  
pp. 270-284 ◽  
Author(s):  
Quan Li
Keyword(s):  
Tibetan Plateau ◽  
Spatial Variability ◽  
Vegetation Restoration ◽  
Alpine Vegetation ◽  
Nam Co ◽  
Central Tibetan Plateau ◽  
Term Change

Spatial variability and the controlling mechanisms of surface sediments from Nam Co, central Tibetan Plateau, China

2015 ◽  
Vol 319 ◽  
pp. 69-77 ◽  
Author(s):  
Junbo Wang ◽  
Liping Zhu ◽  
Yong Wang ◽  
Jianting Ju ◽  
Gerhard Daut ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Spatial Variability ◽  
Surface Sediments ◽  
Nam Co ◽  
Central Tibetan Plateau

scholarly journals Air moisture signals in a stable oxygen isotope chronology of dwarf shrubs from the central Tibetan Plateau

2019 ◽  
Vol 124 (1) ◽  
pp. 53-64
Author(s):  
Jakob Wernicke ◽  
Georg Stark ◽  
Lily Wang ◽  
Jussi Grießinger ◽  
Achim Bräuning
Keyword(s):  
Tibetan Plateau ◽  
Tree Ring ◽  
Growth Ring ◽  
Asian Summer Monsoon ◽  
Monsoon Circulation ◽  
Nam Co ◽  
Climate Signal ◽  
Dwarf Shrubs ◽  
Central Tibetan Plateau ◽  
Annual Growth Rings

Abstract Background and Aims Annually resolved biological climate proxies beyond the altitudinal and latitudinal distribution limit of trees are rare. In such regions, several studies have demonstrated that annual growth rings of dwarf shrubs are suitable proxies for palaeoclimatic investigations. In High Asia, the pioneer work of Liang et al. (Liang E, Lu X, Ren P, Li X, Zhu L, Eckstein D, 2012. Annual increments of juniper dwarf shrubs above the tree line on the central Tibetan Plateau: a useful climatic proxy. Annals of Botany109: 721–728) confirmed the suitability of shrub growth-ring chronologies for palaeoclimatic research. This study presents the first sensitivity study of an annually resolved δ18O time series inferred from Wilson juniper (Juniperus pingii var. wilsonii) from the northern shoreline of lake Nam Co (Tibetan Plateau). Methods Based on five individual dwarf shrub discs, a statistically reliable δ18O chronology covering the period 1957–2009 was achieved (expressed population signal = 0.80). Spearman’s correlation analysis between the δ18O chronology and climate variables from different sources was applied. In a first step, the suitability of various climate data was evaluated. Key Results Examinations of climate–proxy relationships revealed significant negative correlations between the δ18O shrub chronology and summer season moisture variability of the previous and current year. In particular, relative humidity of the previous and current vegetation period significantly determined the proxy variability (ρ = −0.48, P < 0.01). Furthermore, the δ18O variability of the developed shrub chronology significantly coincided with a nearby tree-ring δ18O chronology of the same genus (r = 0.62, P < 0.01). Conclusions The δ18O shrub chronology reliably recorded humidity variations in the Nam Co region. The chronology was significantly correlated with a nearby moisture-sensitive tree-ring δ18O chronology, indicating a common climate signal in the two chronologies. This climate signal was likely determined by moisture variations of the Asian summer monsoon. Local climate effects were superimposed on the supra-regional climate signature of the monsoon circulation. Opposing δ18O values between the two chronologies were interpreted as plant-physiological differences during isotopic fractionation processes.

scholarly journals Precipitation record since AD 1600 from ice cores on the central Tibetan Plateau

2008 ◽  
Vol 4 (3) ◽  
pp. 175-180 ◽  
Author(s):  
T. Yao ◽  
K. Duan ◽  
B. Xu ◽  
N. Wang ◽  
X. Guo ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Ice Core ◽  
Ice Cores ◽  
The North ◽  
Northern Tibetan Plateau ◽  
Central Tibetan Plateau ◽  
Precipitation Record ◽  
Ice Field ◽  
The 19Th Century

Abstract. Lack of reliable long-term precipitation record from the northern Tibetan Plateau has constrained our understanding of precipitation variations in this region. We drilled an ice core on the Puruogangri Ice Field in the central Tibetan Plateau in 2000 to reveal the precipitation variations. The well dated part of the core extends back to AD 1600, allowing us to construct a 400-year annual accumulation record. This record shows that the central Tibetan plateau experienced a drier period with an average annual precipitation of ~300 mm in the 19th century, compared to ~450 mm in the wetter periods during 1700–1780 and the 20th century. This pattern agrees with precipitation reconstructions from the Dunde and Guliya ice cores on the northern Plateau but differs from that found in the Dasuopu ice cores from the southern Plateau The north-south contrasts in precipitation reconstruction reveals difference in moisture origin between the south Tibetan Plateau dominated by the Asian monsoon and the north Tibetan Plateau dominated by the continental recycling and the westerlies.

Monsoonal forcing of Holocene paleoenvironmental change on the central Tibetan Plateau inferred using a sediment record from Lake Nam Co (Xizang, China)

2013 ◽  
Vol 51 (2) ◽  
pp. 253-266 ◽  
Author(s):  
Stefan Doberschütz ◽  
Peter Frenzel ◽  
Torsten Haberzettl ◽  
Thomas Kasper ◽  
Junbo Wang ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Sediment Record ◽  
Nam Co ◽  
Paleoenvironmental Change ◽  
Central Tibetan Plateau ◽  
Lake Nam Co

Quantifying evaporation and its decadal change for Lake Nam Co, central Tibetan Plateau

2016 ◽  
Vol 121 (13) ◽  
pp. 7578-7591 ◽  
Author(s):  
◽  
Kun Yang ◽  
Junbo Wang ◽  
Yanbin Lei ◽  
Yingying Chen ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Decadal Change ◽  
Nam Co ◽  
Central Tibetan Plateau ◽  
Lake Nam Co

Long-Term Changes of Lake Level and Water Budget in the Nam Co Lake Basin, Central Tibetan Plateau

2014 ◽  
Vol 15 (3) ◽  
pp. 1312-1322 ◽  
Author(s):  
Yanhong Wu ◽  
Hongxing Zheng ◽  
Bing Zhang ◽  
Dongmei Chen ◽  
Liping Lei
Keyword(s):  
Climate Change ◽  
Tibetan Plateau ◽  
Water Budget ◽  
Lake Level ◽  
Lake Basin ◽  
The Tibetan Plateau ◽  
Nam Co ◽  
Long Term Changes ◽  
Nam Co Lake

Abstract Long-term changes in the water budget of lakes in the Tibetan Plateau due to climate change are of great interest not only for the importance of water management, but also for the critical challenge due to the lack of observations. In this paper, the water budget of Nam Co Lake during 1980–2010 is simulated using a dynamical monthly water balance model. The simulated lake level is in good agreement with field investigations and the remotely sensed lake level. The long-term hydrological simulation shows that from 1980 to 2010, lake level rose from 4718.34 to 4724.93 m, accompanied by an increase of lake water storage volume from 77.33 × 109 to 83.66 × 109 m3. For the net lake level rise (5.93 m) during the period 1980–2010, the proportional contributions of rainfall–runoff, glacier melt, precipitation on the lake, lake percolation, and evaporation are 104.7%, 56.6%, 41.7%, −22.2%, and −80.9%, respectively. A positive but diminishing annual water surplus is found in Nam Co Lake, implying a continuous but slowing rise in lake level as a hydrological consequence of climate change.

scholarly journals Biogeochemical evidence for freshwater periods during the Last Glacial Maximum recorded in lake sediments from Nam Co, south-central Tibetan Plateau

2015 ◽  
Vol 55 (1) ◽  
pp. 67-82 ◽  
Author(s):  
Roman Witt ◽  
Franziska Günther ◽  
Stefan Lauterbach ◽  
Thomas Kasper ◽  
Roland Mäusbacher ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Lake Sediments ◽  
Last Glacial Maximum ◽  
Glacial Maximum ◽  
Nam Co ◽  
Last Glacial ◽  
South Central ◽  
Central Tibetan Plateau ◽  
The Last Glacial Maximum ◽  
The Last Glacial
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