Journal ArticleDOI
The evolution of hydroclimate in Asia over the Cenozoic: A stable-isotope perspective
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TLDR
This paper used a large compilation of pedogenic and lacustrine carbonate stable oxygen (δ18O) and carbon isotope data (>7,700 samples) to reconstruct Cenozoic hydroclimate in Asia and delineate the boundaries through time of monsoonal and mid-latitude westerly moisture.About:
This article is published in Earth-Science Reviews.The article was published on 2018-10-01. It has received 70 citations till now. The article focuses on the topics: Monsoon & Westerlies.read more
Citations
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Global patterns of land-atmosphere fluxes of carbon dioxide, latent heat, and sensible heat derived from eddy covariance, satellite, and meteorological observations
Abstract: We upscaled FLUXNET observations of carbon dioxide, water, and energy fluxes to the global scale using the machine learning technique, model tree ensembles (MTE). We trained MTE to predict site-level gross primary productivity (GPP), terrestrial ecosystem respiration (TER), net ecosystem exchange (NEE), latent energy (LE), and sensible heat (H) based on remote sensing indices, climate and meteorological data, and information on land use. We applied the trained MTEs to generate global flux fields at a 0.5 degrees x 0.5 degrees spatial resolution and a monthly temporal resolution from 1982 to 2008. Cross-validation analyses revealed good performance of MTE in predicting among-site flux variability with modeling efficiencies (MEf) between 0.64 and 0.84, except for NEE (MEf = 0.32). Performance was also good for predicting seasonal patterns (MEf between 0.84 and 0.89, except for NEE (0.64)). By comparison, predictions of monthly anomalies were not as strong (MEf between 0.29 and 0.52). Improved accounting of disturbance and lagged environmental effects, along with improved characterization of errors in the training data set, would contribute most to further reducing uncertainties. Our global estimates of LE (158 +/- 7 J x 10(18) yr(-1)), H (164 +/- 15 J x 10(18) yr(-1)), and GPP (119 +/- 6 Pg C yr(-1)) were similar to independent estimates. Our global TER estimate (96 +/- 6 Pg C yr(-1)) was likely underestimated by 5-10%. Hot spot regions of interannual variability in carbon fluxes occurred in semiarid to semihumid regions and were controlled by moisture supply. Overall, GPP was more important to interannual variability in NEE than TER. Our empirically derived fluxes may be used for calibration and evaluation of land surface process models and for exploratory and diagnostic assessments of the biosphere.
Dominant control of the South Asian monsoon by orographic insulation versus plateau heating
TL;DR: It is shown that, although Tibetan plateau heating locally enhances rainfall along its southern edge in an atmospheric model, the large-scale South Asian summer monsoon circulation is otherwise unaffected by removal of the plateau, provided that the narrow orography of the Himalayas and adjacent mountain ranges is preserved.
Journal ArticleDOI
Past East Asian monsoon evolution controlled by paleogeography, not CO2
Alexander Farnsworth,Daniel J. Lunt,Stuart A. Robinson,Paul J. Valdes,William H. G. Roberts,Peter D. Clift,Peter D. Clift,Paul J. Markwick,Tao Su,Neil Wrobel,Fran Bragg,Sarah-Jane Kelland,Richard D. Pancost +12 more
TL;DR: It is shown that, apart from a dry period in the middle Cretaceous, a monsoon system has existed in East Asia since at least the Early Cret Jurassic, with little influence from atmospheric CO2.
Journal ArticleDOI
Cenozoic evolution of the steppe-desert biome in Central Asia.
Natasha Barbolini,Natasha Barbolini,Amber Woutersen,Guillaume Dupont-Nivet,Guillaume Dupont-Nivet,Guillaume Dupont-Nivet,Daniele Silvestro,Delphine Tardif,Pauline Coster,Niels Meijer,Cui-Zu Chang,Hong-Xiang Zhang,Alexis Licht,Catarina Rydin,Catarina Rydin,Andreas Koutsodendris,F. Han,Alexander Rohrmann,Xiang-Jun Liu,Yong Zhang,Yannick Donnadieu,Yannick Donnadieu,Frédéric Fluteau,Jean-Baptiste Ladant,G. Le Hir,Carina Hoorn +25 more
TL;DR: It is shown that the Central Asian steppe-desert has existed since at least Eocene times but experienced no less than two regime shifts, one at the Eocene–Oligocene Transition and one in the mid-Miocene.
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A 23 m.y. record of low atmospheric CO2
TL;DR: In this paper, the authors present a new CO2 record across the past 23 m.y. of Earth history based on the δ13C value of terrestrial C3 plant remains, using a method applicable to the entire ∼400m.y history of C3 photosynthesis on land.
References
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Journal ArticleDOI
Trends, Rhythms, and Aberrations in Global Climate 65 Ma to Present
TL;DR: This work focuses primarily on the periodic and anomalous components of variability over the early portion of this era, as constrained by the latest generation of deep-sea isotope records.
Journal ArticleDOI
Stable isotopes in precipitation
TL;DR: In this paper, the isotopic fractionation of water in simple condensation-evaporation processes is considered quantitatively on the basis of the fractionation factors given in section 1.2.
Journal ArticleDOI
NCEP–DOE AMIP-II Reanalysis (R-2)
Masao Kanamitsu,Wesley Ebisuzaki,John S. Woollen,Shi-Keng Yang,J. J. Hnilo,M. Fiorino,Gerald L. Potter +6 more
TL;DR: The NCEP-DOE Atmospheric Model Intercomparison Project (AMIP-II) reanalysis is a follow-on project to the "50-year" (1948-present) N CEP-NCAR Reanalysis Project.
Journal ArticleDOI
Geologic Evolution of the Himalayan-Tibetan Orogen
An Yin,T. Mark Harrison +1 more
TL;DR: A review of the geologic history of the Himalayan-Tibetan orogen suggests that at least 1400 km of north-south shortening has been absorbed by the orogen since the onset of the Indo-Asian collision at about 70 Ma as discussed by the authors.
Journal ArticleDOI
NOAA’s HYSPLIT Atmospheric Transport and Dispersion Modeling System
TL;DR: The Hybrid Single Particle Lagrangian Integrated Trajectory model (HYSPLIT) as mentioned in this paper is one of the most widely used models for atmospheric trajectory and dispersion calculations.
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