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Topic: HadCM3

	HadCM3 - Wikipedia, the free encyclopedia
		HadCM3 ( Had ley Centre C oupled M odel, version 3) is a coupled atmosphere-ocean general circulation model (AOGCM) developed at the Hadley Centre and described by Gordon et al (2000) and Pope et al (2000).
		The higher ocean resolution of HadCM3 is a major factor in this; other factors include a good match between the atmospheric and oceanic components; and an improved ocean mixing scheme (Gent and McWilliams).
		HadCM3 is composed of two components: the atmospheric model HadAM3 and the ocean model (which includes a sea ice model).
	en.wikipedia.org /wiki/HadCM3 (457 words)

	Draft for CLIVAR Exchanges Mag.
		HadCM3 has an atmosphere with a 3.75x2.5 degree longitude-latitude grid and 19 vertical levels, and an ocean with a 1.25x1.25 degree grid and 20 levels in the vertical.
		A simple yet quantitative way of comparing the variability of HadCM3 with the tree-ring estimates is to compute the variance (or standard deviation) of temperature regionally and over the northern hemisphere as a whole (fig 2a-b).
		The control simulation of HadCM3 only represents the "internal" variability of the climate system - that which is a consequence of non-linear interactions within (and between) the atmosphere and the ocean.
	www.met.rdg.ac.uk /~mat/exchanges/exchanges.html (2210 words)

	Ocean heat transport and circulation in HADCM3 (Site not responding. Last check: 2007-11-04)
		In HadCM3, the improvements to the ocean model (the most notable being the in-creased horizontal resolution, the Gent-McWilliams parameterisation of mesoscale eddies and the implementation of an overflow scheme from the Nordic Seas) resulted in the actual ocean heat transports being modelled with some skill.
		Figure 2: HadCM3 northward ocean heat transport as calculated from the atmosphere (implied) and ocean (actual) for a range of periods, Climatological estimates based upon the Da Silva et al (1994) compilation of surface uxes and the estimate from AMIP surface heat fluxes are also included.
		The simulation of sea ice in HadCM3 is much improved over the earlier versions of the Hadley Centre model where ice extents reached south of Iceland in winter.
	regclim.met.no /rapport_2/presentation02/presentation02.htm (1621 words)

	Serie storiche - CLIMAGRI
		Il modello HADCM3 può essere considerato come lo stato dell'arte dei modelli climatici, in grado di rappresentare i principali processi fisici e chimici con cui i fenomeni climatici si realizzano.
		Rispetto agli sforzi precedentemente fatti nei modelli AOGCM, il modello HADCM3 non richiede correzioni nei flussi di massa e di energia (ovvero aggiustamenti in positivo o in negativo del calore fornito al sistema, in particolare per ciò che riguarda la superficie oceanica) per produrre una buona simulazione.
		Il numero dei punti del GCM HADCM3 è pari a, per tutti i parametri, : 30 = punti del reticolato GCM di 30 < latitudine < 50 e 5 < longitudine < 20 e la loro posizione dipende dal tipo di parametro.
	www.climagri.it /scenari.htm (2137 words)

	Permafrost Laboratory - projects - Transects (Site not responding. Last check: 2007-11-04)
		The comparison shows that the range of increase in five-years mean ground temperatures varies from 2 to 5 degrees C for different models for northern parts of the East Siberian transect and from 1 to 3 degrees C for southern parts.
		GFDL and HadCM3 models are the closest to the referenced scenario.
		Three models CCC, HadCM3 and the reference model predict the formation of the zone on which permafrost is thawing from the surface.
	www.gi.alaska.edu /snowice/Permafrost-lab/proj_trans/pr_trans.html (2646 words)

	Hadley Centre: HadCM3 (Site not responding. Last check: 2007-11-04)
		HadCM3 is a coupled atmosphere-ocean general circulation model (AOGCM) developed at the Hadley Centre and described by
		This is equivalent to a surface resolution of about 417 km x 278 km at the Equator, reducing to 295 km x 278 km at 45° of latitude (comparable to a spectral resolution of T42).
		This permits the direct and indirect forcing effects of sulphate aerosols to be modelled given scenarios for sulphur emissions and oxidants.
	www.met-office.gov.uk /research/hadleycentre/models/HadCM3.html (1189 words)

	School of Development Studies - Research in Climate and Development (Site not responding. Last check: 2007-11-04)
		Results from the HadCM3 General Circulation Model are examined for a control (1956-1995) and two future periods (2000-2039 and 2060-2099).
		HadCM3 pressure data are used to generate indices representative of the Southern Oscillation Index and Brandon Marion Index.
		For future periods HadCM3 produces varying changes in mean rainfall in the region, with more consistent increases in rainfall intensity, variability and dry spell length.
	www.uea.ac.uk /menu/acad_depts/dev/climate/impacts_2.htm (251 words)

	The Model, HadCM3 (Site not responding. Last check: 2007-11-04)
		A significant improvement with respect to the previous version of the model is the elimination of the flux adjustments which were needed in HadCM2 to keep the model climate stable.
		HadCM3 has no flux adjustment term and has a stable climate in the global mean.
		We analyse two HadCM3 simulations with four times pre- industrial CO to look for changes in the statistics of ENSO behaviour.
	www.agu.org /pubs/toc/gl/gl/gl0021/2000GL011747/node2.html (248 words)

	aNSwer - John Sweeney et al.
		Upper air data for the 1961-1990 period was obtained from the NCEP/NCAR Re-analysis project for the spatial domain around Ireland and regridded to the GCM output grid resolution (2.5o latitude by 3.75o longitude).
		Results from the Coupled Model Inter-comparison Project suggested that HadCM3 was as effective in simulating mean monthly observed temperature and precipitation patterns as other leading models.
		Two representing current climate using the NCEP and HadCM3 predictors for the 1961-1990 period and two representing modeled future climate for the 2041-2070 and 2061-2090 periods.
	www.answer-online.org /research_sweeney.html (1679 words)

	Arctic Climate Change — Greenhouse models don't pan out that good
		Note: During the 1961-1990 interval the actual mean temperature for the Edmonton rural area was 2.1°Celsius (3.6°C in the City of Edmonton).
		The various models show the average daily precipitation for that interval to be 2.4 mm (NCAR), 2.3 mm (GFDL), 2.4 mm (CCC), 2.2 mm (CSIRO), 2.3 mm (DKRZ), 2.0 mm (MPCI), 2.5 mm (CCSR), and 2.3 mm (HADCM3) respectively.
		See also a commentary discussing another climate model that was used to assess the respective accuracies of two data sets of temperature records that were derived using satellite measurements:
	www.fathersforlife.org /REA/acc.htm (428 words)

	ADAPT
		HadCM3 is a coupled atmosphere-ocean general circulation model (AOGCM) developed at the Hadley Centre and described by Gordon et al (2000) and Pope et al (2000).
		The higher ocean resolution of HadCM3 is a major factor in this.
		The atmospheric component of HadCM3 has 19 levels with a horizontal resolution of 2.5° of latitude by 3.75° of longitude, which produces a global grid of 96 x 73 grid cells.
	www.geo.vu.nl /~ivmadapt/models/fb_hadley.htm (778 words)

	COAPEC Thematic Programme Proposal February 2000
		The major goal of COAPEC is to determine the impact on climate of the coupling between the atmosphere and the Atlantic Ocean on seasonal to decadal timescales.
		She concludes that a detailed investigation of the NADW cell and formation of NADW in HadCM3 is necessary.
		As well as comparing the HadCM3 diagnostics with the results from the inversions, the HadCM3 results will also be analysed to work out a decorrelation timescale for the variability of the overturning.
	www.mth.uea.ac.uk /ocean/coapec/coapecw.htm (3824 words)

	COAPEC Third Annual Meeting: July 2-3 2002
		Simulation of historical ocean variability using HadOM3 (the ocean component of HadCM3):- As part of the PREDICATE project the focus is on the fresh water budget and as part of NOCES the focus is on tracers and variability of the C-cycle c.f.
		The 1000-year HadCM3 data set being downloaded to BADC is now 66% complete, but there is a need to remove some overlapped fields.
		In this case, HadCM3 was sampled at TAO locations and temperature for Niño3 was used as a metric for similarity when scanning 2000 years of HadCM3 data.
	www.soc.soton.ac.uk /coapec/AM3.php (5913 words)

	Heriot-Watt Maths Research Report HWM99-29 (Site not responding. Last check: 2007-11-04)
		Climate output from the UK Hadley Centre?s HadCM2 and HadCM3 experiments for the period 1860 to 2100, with IS92a greenhouse gas forcing, together with predicted patterns of N deposition and increasing CO2, were input (offline) to the dynamic vegetation model, Hybrid v4.1 (Friend et al., 1997; Friend and White, 1999).
		This model represents biogeochemical, biophysical and biogeographical processes, coupling the carbon, nitrogen and water cycles on a sub-daily timestep, simulating potential vegetation and transient changes in annual growth and competition between eight generalized plant types in response to climate.
		HadCM3 gave a more erratic temporal evolution of NEP than HadCM2, with a dramatic collapse in NEP in the 2050s.
	www.ma.hw.ac.uk /maths/deptreps/HWM99-29.html (284 words)

	ClimatePrediction.Net gateway
		We are using the HadSM3 model in the first phase of the experiment to test the experimental setup and to explore parameter space.
		HadCM3 has a higher resolution ocean, 288x288 and has 20 levels in the vertical.
		In its standard configuration it does not require flux adjustments, but given the perturbations we are making to the model physics, we will, in general, need to include flux adjustments in our models.
	www.climateprediction.net /cpdnresearch/science_project.php (617 words)

	Emissions pathways, climate change, and impacts on California -- Hayhoe et al. 101 (34): 12422 Data Supplement - HTML ...
		Geographical patterns of precipitation change are consistent across models and scenarios, with the greatest decreases (increases for the PCM B1 scenario) occurring on the northwest coast and along the eastern Central Valley and western Sierras.
		Precipitation exceedence probabilities for PCM (solid) and HadCM3 (dotted) projections under emission scenarios A1fi and B1 for 2020-2050 and 2070-2099 for Shasta Dam, Los Angeles, Sacramento, and Fresno.
		Large-scale pattern of 2070-2099 precipitation anomalies relative to the reference period for North America for the HadCM3 and PCM SRES A1fi (higher), A2 and B2 (midrange), and B1 (lower) emission scenarios.
	www.pnas.org /cgi/content/full/0404500101/DC1 (997 words)

	Models in COAPEC
		HadCM3 is just one configuration of the Met Office Unified Model (UM), a highly configurable model used by the Met Office both for numerical weather prediction and for climate modelling.
		The code of the UM was developed on Cray supercomputers, but much work has also gone into producing a ported version of the UM which will run on other platforms including other supercomputers, Unix workstations, personal computers and Beowulf clusters.
		A hybrid co-ordinate ocean model coupled to HadAM3 (the atmospheric component of HadCM3) developed as part of the COAPEC project "North Atlantic variability and predictability, and impacts on European climate, in UK coupled models".
	www.soc.soton.ac.uk /coapec/models.php (472 words)

	COAPEC Index page (Site not responding. Last check: 2007-11-04)
		This means that there is a difference in the indicated date of origin in the data files, and can cause a discontinuity if not corrected for during analysis.
		The data from a 500 year HadCM3 control integration performed on a linux Beowulf cluster using UM version 4.5 at the BADC has recently been included in the archive.
		A validation report of the 500-year HadCM3 control integration run at the BADC (PDF document): A.
	www.badc.rl.ac.uk /data/coapec (942 words)

	Field Scale Adaptation Strategies to Climate Change (Site not responding. Last check: 2007-11-04)
		Three time slices were used, 1961-1990, 2010-2039, 2070-2099, and for each basin-crop-time slice a business as usual (base line) and two adaptation strategies have been explored.
		Climate data for the three periods of 30 years considered have been subtracted from two General Circulation Models (HADCM3 and ECHAM4) and for each of them two emission scenarios (A2 and B2) were used.
		Overall, the general picture is that crop yields will be higher in the future, but that variation in yields between years will increase as well.
	www.futurewater.nl /uk/projects/adapt.htm (1009 words)

	HadCM3 Control Index page (Site not responding. Last check: 2007-11-04)
		HadCM3 Control Run data from the Hadley Centre, Met Office
		Access to HadCM3 Control data at the BADC is restricted to those researchers directly involved with researchers involved with either the COAPEC, LINK or RAPID programmes.
		When follow-up work is required, the BADC support will carry out the work as quickly and efficiently as possible, and in any case, the user will be kept informed of progress.
	badc.nerc.ac.uk /data/hadcm3-control/index.html (337 words)

	Royal Meteorological Society - Wednesday Meeting Abstracts (Site not responding. Last check: 2007-11-04)
		In a long control run of the UK Hadley Centre's coupled climate model, HadCM3, it was found that decadal anomalies of atmospheric and oceanic energy transports are significantly anticorrelated and their variances have similar magnitudes, which is consistent with the predications of Bjerknes compensation.
		HadCM3 captures the observed trend but not the variability.
		We suggest that outside the well-observed upper ocean of the Northern hemisphere, heat content estimates are sensitive to the method used for filling in gaps.
	www.royal-met-soc.org.uk /wedabs040519.html (607 words)

	Adaptation to Climate Change: Sri Lanka (Site not responding. Last check: 2007-11-04)
		Climate projections from the Hadley General Circulation Model HadCM3 were used to assess impact and to analyze adaptation strategies for the basin.
		Special emphasis was put on downscaling of the HadCM3 projections to local conditions using an absolute adjustment for temperature and relative for precipitation.
		To ensure food security it might be wise to increase the cropped area by 10 to 20% and keep the irrigation applications at the 100% levels.
	www.futurewater.nl /uk/projects/adapt_walawe.htm (673 words)

	Ilmatieteen laitos - Uutiset - 2001
		Hadley keskuksen malli tunnetaan lyhenteellä HadCM3 ja Max Planck Instituutin malli lyhenteellä ECHAM4.
		HadCM3 mallin mukaan muutos jaksosta 1961-1990 jaksoon 1991-2020 on hyvin pieni ja esimerkiksi Sodankylässä ei lämpenemistä juurikaan tapahtuisi.
		HadCM3 mallin mukaan muutos olisi vain 0.5-4 % jaksoon 1990-2021 (alle 1 % Sodankylässä) ja 14 % mentäessä jaksoon 2021-2050.
	www.fmi.fi /uutiset/index_3.html?Id=998910600.html (346 words)

	The role of the basic state in determining the predictability of the tropical climate system, with particular reference ...
		The basic state errors in the tropical Pacific of the UK Met Office Hadley Centre Model (HadCM3) are partially corrected by the use of a flux adjusted version of the model (HadCM3FA), originally devised by Inness et.
		However, monsoon variability in the Hadley Centre model increases with flux adjustments, observed as an increase in the standard deviation of the DMI in 40 year integrations of the model: 1.20 for HadCM3, 2.19 for HadCM3FA, 1.60 for ERA40, (used as an indicator of the real-world scenario).
		That the use of a seasonal cycle of flux-adjustments to force sea surface temperatures in a coupled GCM increases the interannual variability is somewhat surprising.
	www.ugamp.nerc.ac.uk /cgam-trop/research/orga/Turner_basic_state.html (581 words)

	Met Office Coupled Model Documentation
		A number of enhancements to HadCM3 were made for GloSea: these include increased vertical ocean resolution, increased meridional ocean resolution in the tropics, and the new Hadley Centre coastal tiling scheme which enables specification of the land-sea mask at the ocean resolution.
		The ocean component has a zonal grid spacing of 1.25°, while the meridional grid spacing is 0.3° near the equator increasing polewards to 1.25°, and there are 40 vertical levels.
		Like HadCM3, the CGCM includes an active ice model and detailed land surface processes, with no flux corrections.
	www.ecmwf.int /research/demeter/general/docmodel/meto.html (500 words)

	Martens, P (Site not responding. Last check: 2007-11-04)
		Global estimates of the potential impact of climate change on malaria transmission were calculated based on future climate scenarios produced by the HadCM2 and the more recent HadCM3 global climate models developed by the UK Hadley Centre.
		This assessment uses an improved version of the MIASMA malaria model, which incorporates knowledge about the current distributions and characteristics of the main mosquito species of malaria.
		On a global level, the numbers of additional people at risk of malaria in 2080 due to climate change is estimated to be 300 and 150 million for P. falciparum and P. vivax types of malaria, respectively, under the HadCM3 climate change scenario.
	www.yale.edu /ceo/Projects/CAP/CAPReferences/Martens.htm (276 words)

	[No title] (Site not responding. Last check: 2007-11-04)
		It is now recognised, however, that the remote forcing of southern African rainfall is not always present, and that for sustained periods in the observed record, regional forcing has been much more important (Fauchereau et al., 2003).
		We explore these relationships in the HadCM3 model first to evaluate the model representation of these processes, and secondly to explore the possible outlooks for southern African rainfall over the 21st century.
		There are significant periods in the observed record, and in HadCM3, where ENSO derived predictability of southern African rainfall is much lower than at present.
	www.clivar.org /publications/exchanges/ex27/word_doc/swann.doc (1508 words)

	[No title] (Site not responding. Last check: 2007-11-04)
		CHIME is designed to be identical to the Hadley Centre's HadCM3 model except for its ocean component, allowing us to investigate the sensitivity of the climate to the choice of vertical coordinate in the ocean model.
		The path of the North Atlantic Current is more realistic than that in HadCM3, removing the heat flux errors in the subpolar gyre seen in the latter.
		Similarly, CHIME does not have the 4K cold bias seen in the North Pacific in HadCM3, the latter again associated with heat flux errors.
	oceanmodeling.rsmas.miami.edu /lom/abstracts_clean_05 (7674 words)

	CiteULike: Eastward propagating surface anomalies at ocean gyre boundaries (Site not responding. Last check: 2007-11-04)
		Inspection of animations and time-distance (Hovmoller) plots of unfiltered data from a state-of-the-art coupled climate model (HadCM3) reveals eastward propagating surface temperature-salinity anomalies at subpolar/subtropical gyre boundaries throughout the world ocean.
		By applying a decadal-timescale band-pass filter to the SST time series, we identify underlying propagation of basin-scale anomalies in both HadCM3 and observations.
		HadCM3 displayed only one propagating anomaly of this type in a typical 100 years of data.
	www.citeulike.org /user/freedryk/article/93529 (369 words)

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