Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.5/6830
Título: CliPick - Climate change web picker. Bridging climate and biological modeling scientific communities
Autor: Palma, J.H.N.
Palavras-chave: climate
modelling
agroforestry
AGFORWARD
EURAF
Data: 2014
Resumo: Climate change impact is a transversal assessment in different studies. However, there is often a complex pathway usually requiring programming skills, from the need to the usage of climate data for different kind of modeling purposes. The CliPick tool provides an user-friendly interface to access climate datasets, that are used to supply climate scenarios for the International Panel on Climate Change (IPCC). The most common format used by climate modelers to exchange data is the network common data format (NETCDF) which is a binary file containing array-oriented scientific data that ease data exchange between climate modelers. Another common characteristic of climate datasets is their large size. Even with binary formats, the large areas (e.g. European scale, including oceans) and the time span (often 100 years in future) delivers an amount of information that needs to be mined to use for other modeling areas requiring simpler and easy access data. Clipick is a web based interface that uses the application programming interface of GoogleMaps and the javascript libraries of DOJO and JQuery as client side programming while PHP and Python languages are used at server side. AJAX, a programming technique bridging client and server sides, eases the communication between the user inputs and translates them into server requests to access the data. There are three steps to retrieve data from an end user point of view: 1)Provide the following details: a) time frame to retrieve data (between 1951 to 2100), b) time step of the data to be retrieved (daily or monthly), c) file format for use of the data YieldSAFE or HiSAFE models, d) dataset source (currently only HadRM3Q0, but other may be added as needed); 2) Select an approximate location of the plot/stand to simulate, by moving an icon in the map through the GoogleMaps interface; 3) Data extraction. After the last step a link is built to download a text file with the data. Additional extractions can be executed as they will be queued. The climate scenario being used is one of several available in the ENSEMBLES dataset repository (http://www.ensembles-eu.org/). The Hadley Center Regional Model 3Q0 (HadRM3Q0) was the model initially chosen because Clipick was firstly developed in Portugal and this is the most suited model for Portuguese context. However, this model seems to be suitable for other regions and the quality of the data is being verified by the AGFORWARD EU consortium partners. Nevertheless, Clipick is ready to add other ENSEMBLES datasets if needed. The scenario A1B is considered a moderate climate change scenario that is being widely used by the scientific community. Clipick accesses 8 climate variables across continental Europe (minimum, mean and maximum temperature, precipitation, radiation, minimum and maximum relative humidity and wind speed). Each variable is stored in 15 blocks of ten years each (1951-2100) and each block of ten years has about 450 MB (daily data). In total there are about 54GB of data for a climate scenario, for the eight climate variables. The tool was built to be flexible regarding the addition of other climate variables and scenario datasets, in order to further supply different input formats to other modeling tools needing climate data. The tool is available @ http://home.isa.utl.pt/~joaopalma/projects/agforward/clipick/index.html
Descrição: Poster
URI: http://hdl.handle.net/10400.5/6830
Aparece nas colecções:CEF - POSTERS

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