<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>13</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Williamson, M.</style></author><author><style face="normal" font="default" size="100%">Lenton, T.</style></author><author><style face="normal" font="default" size="100%">Shepherd, J</style></author><author><style face="normal" font="default" size="100%">Edwards, N.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">An efficient numerical terrestrial scheme (ENTS) for fast earth system modelling</style></title><secondary-title><style face="normal" font="default" size="100%">Tyndall Centre Working Paper 83</style></secondary-title><short-title><style face="normal" font="default" size="100%">Tyndall Centre Working Papers</style></short-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">carbon cycle</style></keyword><keyword><style  face="normal" font="default" size="100%">Earth system</style></keyword><keyword><style  face="normal" font="default" size="100%">efficient numerical terrestrial scheme</style></keyword><keyword><style  face="normal" font="default" size="100%">ENTS</style></keyword><keyword><style  face="normal" font="default" size="100%">fast earth system modelling</style></keyword><keyword><style  face="normal" font="default" size="100%">land surface</style></keyword><keyword><style  face="normal" font="default" size="100%">Model</style></keyword><keyword><style  face="normal" font="default" size="100%">photosynthesis</style></keyword><keyword><style  face="normal" font="default" size="100%">respiration</style></keyword><keyword><style  face="normal" font="default" size="100%">soil</style></keyword><keyword><style  face="normal" font="default" size="100%">vegetation</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2006</style></year></dates><abstract><style face="normal" font="default" size="100%">Here we present a new land surface physics and terrestrial carbon cycle model, called the Efficient Numerical Terrestrial Scheme (ENTS). The model is designed for long time period simulations and large ensemble studies in Earth system models of intermediate complexity (EMICs). ENTS contains reservoirs of vegetation carbon, soil carbon and soil water in each grid cell. It is designed as a spatial model of minimal complexity and process description needed to simulate the coupled biophysical land state. We have developed new simple parameterisations of vegetation fractional cover and roughness length as functions of vegetation carbon. We also make and justify the approximation that the land radiation balance comes to equilibrium with the atmosphere quickly (in a few days) when the solar forcing is a diurnal average (as in our EMIC). We tune the carbon cycle parameters towards observed values of global carbon storage in vegetation and soil and estimated global fluxes of net photosynthesis, vegetation respiration, leaf litter and soil respiration. When the model is forced with long term monthly mean fields of NCEP reanalysis climate data, we find ENTS yields broadly accurate patterns of vegetation and soil carbon storage, vegetation fraction, surface albedo, land temperature and evaporation.</style></abstract><custom1><style face="normal" font="default" size="100%">UEA</style></custom1></record></records></xml>