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Evaluation of Land Surface Models in Reproducing Satellite-Derived LAI over the High-Latitude Northern Hemisphere. Part I: Uncoupled DGVMs

Guillermo Murray-Tortarolo, Alessandro Anav, Pierre Friedlingstein, Stephen Sitch, Shilong Piao, Zaichun Zhu, Benjamin Poulter, Soenke Zaehle, Anders Ahlström, Mark Lomas, Sam Levis, Nicholas Viovy (+1 others)
2013 Remote Sensing  
The objective of this paper is to compare new, satellite-derived LAI measurements with modeled output for the Northern Hemisphere.  ...  Leaf Area Index (LAI) represents the total surface area of leaves above a unit area of ground and is a key variable in any vegetation model, as well as in climate models.  ...  Acknowledgments We acknowledge the TRENDY-DGVM project that is responsible for all the data on DGVMs used in this work.  ... 
doi:10.3390/rs5104819 fatcat:r74lpqnzrfcntld5wocluomaae

Evaluation of Land Surface Models in Reproducing Satellite Derived Leaf Area Index over the High-Latitude Northern Hemisphere. Part II: Earth System Models

Alessandro Anav, Guillermo Murray-Tortarolo, Pierre Friedlingstein, Stephen Sitch, Shilong Piao, Zaichun Zhu
2013 Remote Sensing  
Additionally we compare the results with previous analyses (Part I) of uncoupled land surface models (LSMs) to assess the relative contribution of vegetation and OPEN ACCESS Remote Sens. 2013, 5 3638 climatic  ...  We focus on the average LAI and the length of the growing season on Northern Hemisphere over the period 1986-2005.  ...  Acknowledgments We acknowledge the World Climate Research Programme's Working Group on Coupled Modelling, which is responsible for CMIP, and we thank the climate modeling groups (listed in Table 1 of  ... 
doi:10.3390/rs5083637 fatcat:6ypbybpkdvhgzcb2awrxakxp3e

Vegetation baseline phenology from kilometric global LAI satellite products

Aleixandre Verger, Iolanda Filella, Frédéric Baret, Josep Peñuelas
2016 Remote Sensing of Environment  
9 Land surface phenology derived from remotely sensed satellite data can substantially improve our 10 macroecological knowledge and the representation of phenology in earth system models.  ...  The accuracy of the 16 derived phenological metrics, evaluated using available ground observations for birch forests over 17 Europe (and lilac shrubs over North America), improved as compared to those  ...  Evaluation of Land Surface 639 Models in Reproducing Satellite-Derived LAI over the High-Latitude Northern Hemisphere. Part I: 640 Uncoupled DGVMs.  ... 
doi:10.1016/j.rse.2016.02.057 fatcat:6hnpz6ibl5emdlydsqaxzbzk6y

Spatiotemporal patterns of terrestrial gross primary production: A review

Alessandro Anav, Pierre Friedlingstein, Christian Beer, Philippe Ciais, Anna Harper, Chris Jones, Guillermo Murray-Tortarolo, Dario Papale, Nicholas C. Parazoo, Philippe Peylin, Shilong Piao, Stephen Sitch (+3 others)
2015 Reviews of Geophysics  
Given its central role in the global carbon budget and the increasing need to understand the role of the terrestrial biosphere in global carbon cycle, it is critical to develop a clear understanding of  ...  Results show a large range in the mean global GPP estimates. The different data sets broadly agree on GPP seasonal cycle in terms of phasing, while there is still discrepancy on the amplitude.  ...  Acknowledgments We acknowledge the World Climate Research Programme's Working Group  ... 
doi:10.1002/2015rg000483 fatcat:t4oaovidjndahgigjtxthrcl64

Identifying environmental controls on vegetation greenness phenology through model-data integration

M. Forkel, N. Carvalhais, S. Schaphoff, W. v. Bloh, M. Migliavacca, M. Thurner, K. Thonicke
2014 Biogeosciences Discussions  
Here we implemented a~new phenology model within the LPJmL (Lund Potsdam Jena managed lands) DGVM and integrated several observational data sets to improve the ability of the model in reproducing satellite-derived  ...  Existing dynamic global vegetation models (DGVMs) have a~limited ability in reproducing phenology and decadal dynamics of vegetation greenness as observed by satellites.  ...  We thank Maarten Braakhekke and Enrico Tomelleri for testing model optimization algorithms. We thank Ulrich Weber for his assistance in data processing.  ... 
doi:10.5194/bgd-11-10917-2014 fatcat:jkgvumbxqzfojdaepkbog47vpa

Identifying environmental controls on vegetation greenness phenology through model–data integration

M. Forkel, N. Carvalhais, S. Schaphoff, W. v. Bloh, M. Migliavacca, M. Thurner, K. Thonicke
2014 Biogeosciences  
Here we implemented a new phenology model within the LPJmL (Lund Potsdam Jena managed lands) DGVM and integrated several observational data sets to improve the ability of the model in reproducing satellite-derived  ...  </strong> Existing dynamic global vegetation models (DGVMs) have a limited ability in reproducing phenology and decadal dynamics of vegetation greenness as observed by satellites.  ...  We thank Maarten Braakhekke and Enrico Tomelleri for testing model optimization algorithms. We thank Ulrich Weber for his assistance in data processing.  ... 
doi:10.5194/bg-11-7025-2014 fatcat:obndyj3xlfdmberfedfrk2wode

The CCSM4 Land Simulation, 1850–2005: Assessment of Surface Climate and New Capabilities

David M. Lawrence, Keith W. Oleson, Mark G. Flanner, Christopher G. Fletcher, Peter J. Lawrence, Samuel Levis, Sean C. Swenson, Gordon B. Bonan
2012 Journal of Climate  
The global land air temperature bias is reduced and the annual cycle is improved in many locations, especially at high latitudes.  ...  This paper reviews developments for the Community Land Model, version 4 (CLM4), examines the land surface climate simulation of the Community Climate System Model, version 4 (CCSM4) compared to CCSM3,  ...  and CISL's 12-PB HPSS archive provided over 1 PetaByte of storage in support of this research project.  ... 
doi:10.1175/jcli-d-11-00103.1 fatcat:oyh5fsq7sbajper6qhn6z6weua

Description of the Earth system model of intermediate complexity LOVECLIM version 1.2

H. Goosse, V. Brovkin, T. Fichefet, R. Haarsma, P. Huybrechts, J. Jongma, A. Mouchet, F. Selten, P.-Y. Barriat, J.-M. Campin, E. Deleersnijder, E. Driesschaert (+14 others)
2010 Geoscientific Model Development  
The model also tends to underestimate the surface temperature changes (mainly at low latitudes) and to overestimate the ocean heat uptake observed over the last decades.  ...  VECODE also simulates the evolution of the carbon cycle over land while the ocean carbon cycle is represented by LOCH, a comprehensive model that takes into ac-Correspondence to: H.  ...  The land-surface model is part of the ECBilt code and has the same grid as the atmospheric model.  ... 
doi:10.5194/gmd-3-603-2010 fatcat:j5zzztofe5dedicqyfa4vi55iq

Description of the Earth system model of intermediate complexity LOVECLIM version 1.2

H. Goosse, V. Brovkin, T. Fichefet, R. Haarsma, P. Huybrechts, J. Jongma, A. Mouchet, F. Selten, P.-Y. Barriat, J.-M. Campin, E. Deleersnijder, E. Driesschaert (+14 others)
2010 Geoscientific Model Development Discussions  
The model also tends to underestimate the surface temperature changes (mainly at low latitudes) and to overestimate the ocean heat uptake observed over the last decades.  ...  VECODE also simulates the evolution of the carbon cycle over land while the ocean carbon cycle is represented by LOCH, a comprehensive model that takes into ac-Correspondence to: H.  ...  The land-surface model is part of the ECBilt code and has the same grid as the atmospheric model.  ... 
doi:10.5194/gmdd-3-309-2010 fatcat:z4zcwroxrvbv7d3zi7xhpq2upe

ESD Reviews: Climate feedbacks in the Earth system and prospects for their evaluation

Christoph Heinze, Veronika Eyring, Pierre Friedlingstein, Colin Jones, Yves Balkanski, William Collins, Thierry Fichefet, Shuang Gao, Alex Hall, Detelina Ivanova, Wolfgang Knorr, Reto Knutti (+8 others)
2019 Earth System Dynamics  
In this article, we present an overview of climate feedbacks for Earth system components currently included in state-of-the-art ESMs and<span id="page380"/> discuss the challenges to evaluate and quantify  ...  We present an outlook for promising approaches that can help to quantify and to constrain the large number of feedbacks in ESMs in the future.  ...  Change in the "sensitivity" of surface albedo α s over change in surface temperature T s of the Northern Hemisphere landmasses ( α s / T s ) in terms of climate change (y axis) versus in terms of the seasonal  ... 
doi:10.5194/esd-10-379-2019 fatcat:3mg7gm4ctvdhpcljwexc4asu6q

Climate feedbacks in the Earth system and prospects for their evaluation

Christoph Heinze, Veronika Eyring, Pierre Friedlingstein, Colin Jones, Yves Balkanski, Williams Collins, Thierry Fichefet, Shuang Gao, Alex Hall, Detelina Ivanova, Wolfgang Knorr, Reto Knutti (+8 others)
2018 Earth System Dynamics Discussions  
In this article, we present an overview of climate feedbacks for Earth system components currently included in state-of-the-art ESMs and discuss the challenges to evaluate and quantify them.  ...  We present an outlook for promising approaches that can help quantifying and constraining the large number of feedbacks in ESMs in the future.  ...  Figure 19 : 19 Change in the "sensitivity" of surface albedo Δαs over change in surface temperature ΔTs of the Northern Hemisphere landmasses (Δαs/ΔTs) in terms of climate change (y axis) versus in terms  ... 
doi:10.5194/esd-2018-84 fatcat:n6fozmplpbdlnbnovqt6aenjp4

A review of natural aerosol interactions and feedbacks within the Earth system

K. S. Carslaw, O. Boucher, D. V. Spracklen, G. W. Mann, J. G. L. Rae, S. Woodward, M. Kulmala
2010 Atmospheric Chemistry and Physics  
Taking into account only the direct radiative effect of changes in the atmospheric burden of natural aerosols, and neglecting potentially large effects on other parts of the Earth system, a global mean  ...  We review the impact of these natural systems on atmospheric aerosol based on observations and models, including the potential for long term changes in emissions and the feedbacks on climate.  ...  This work was supported by the EUCAARI project from Framework Programme 7 of the European Commission and the NERC QUEST programme.  ... 
doi:10.5194/acp-10-1701-2010 fatcat:lcpshy4zvne2pi3zvv62qx5dc4

On biogeophysical interactions between vegetation phenology and climate simulated over Europe

D. Rechid
2009
. 5 Conclusions and outlook 4 Sensitivity of climate models to seasonal variability of snow-free land surface albedo 4. 1 Introduction 4. 2 Background albedo parameterization in ECHAM and REMO 4. 3 Global  ...  Contents 3. 4 Annual background albedo cycle for climate modelling 3. 4. 1 Land surface representation and background albedo in REMO and ECHAM5 3. 4. 2 New background albedo scheme in REMO and ECHAM5 3  ...  The comparison of the simulated land surface albedo to satellite retrieved albedo values over Europe (figure 5.9) shows good agreement of the data in all evaluated regions.  ... 
doi:10.17617/2.994074 fatcat:dcannl7lxfb7tiwxn5wmooerxe

Effects of land-based climate change mitigation on ecosystem carbon cycling and beyond

Andreas Krause
2018
Das Land stellt insgesamt jedoch momentan eine Netto-Kohlenstoffsenke dar und besitzt die Möglichkeit zusätzlichen Kohlenstoff zu speichern, falls eine entsprechende Nutzung erfolgt.  ...  Models LPJ-GUESS), um die längerfristigen Auswirkungen von Landnutzungswandel auf die Regeneration von Ökosystemen zu erforschen.  ...  S6 .) seem to reveal some improvements compared to the biases reported in in mid-and high latitudes, but the model still overestimates runoff in parts of the tropics.  ... 
doi:10.5445/ir/1000082514 fatcat:cuclouaf2ze75kgwwctmv4gtsi