Search results for "ECHAM"
showing 8 items of 18 documents
A quasi chemistry-transport model mode for EMAC
2010
Abstract. A quasi chemistry-transport model mode (QCTM) is presented for the numerical chemistry-climate simulation system ECHAM/MESSy Atmospheric Chemistry (EMAC). It allows for a quantification of chemical signals through suppression of any feedback between chemistry and dynamics. Noise would otherwise interfere too strongly. The signal is calculated from the difference of two QCTM simulations, a reference simulation and a sensitivity simulation. In order to avoid the feedbacks, the simulations adopt the following offline chemical fields: (a) offline mixing ratios of radiatively active substances enter the radiation scheme, (b) offline mixing ratios of nitric acid enter the scheme for re-…
2020
Abstract. A new cloud microphysical scheme including a detailed parameterization for aerosol-driven ice formation in cirrus clouds is implemented in the global ECHAM/MESSy Atmospheric Chemistry (EMAC) chemistry–climate model and coupled to the third generation of the Modal Aerosol Dynamics model for Europe adapted for global applications (MADE3) aerosol submodel. The new scheme is able to consistently simulate three regimes of stratiform clouds – liquid, mixed-, and ice-phase (cirrus) clouds – considering the activation of aerosol particles to form cloud droplets and the nucleation of ice crystals. In the cirrus regime, it allows for the competition between homogeneous and heterogeneous fre…
The on-line coupled atmospheric chemistry model system MECO(n) – Part 5: Expanding the Multi-Model-Driver (MMD v2.0) for 2-way data exchange includin…
2018
Abstract. As part of the Modular Earth Submodel System (MESSy), the Multi-Model-Driver (MMD v1.0) was developed to couple online the regional Consortium for Small-scale Modeling (COSMO) model into a driving model, which can be either the regional COSMO model or the global European Centre Hamburg general circulation model (ECHAM) (see Part 2 of the model documentation). The coupled system is called MECO(n), i.e., MESSy-fied ECHAM and COSMO models nested n times. In this article, which is part of the model documentation of the MECO(n) system, the second generation of MMD is introduced. MMD comprises the message-passing infrastructure required for the parallel execution (multiple programme mul…
Explotación de recursos geológicos en la periferia valenciana: Camp de Túria y Hoya de Buñol-Chiva
1990
En este artículo se pretende estudiar la influencia que ejerce el área metropolitana de Valencia (AMV) sobre el espacio contiguo occidental (las comarcas del Camp de Turia y la Hoya de Buñol-Chiva) en un aspecto determinado: la explotación de los recursos geológicos de este espacio. Para ello el estudio se centrara en primer lugar en las condiciones litológicas del área en cuestión. Seguidamente, definiremos la evolución de este sector desde finales del siglo XVIII. Y, finalmente, estudiaremos la situación actual. Para ello nos basaremos en la localización de los yacimientos y su evolución, así como en la titularidad de las distintas explotaciones y en los principales destinos del volumen e…
A new radiation infrastructure for the Modular Earth Submodel System (MESSy, based on version 2.51)
2016
Abstract. The Modular Earth Submodel System (MESSy) provides an interface to couple submodels to a basemodel via a highly flexible data management facility (Jöckel et al., 2010). In the present paper we present the four new radiation related submodels RAD, AEROPT, CLOUDOPT and ORBIT. The submodel RAD (with shortwave radiation scheme RAD_FUBRAD) simulates the radiative transfer, the submodel AEROPT calculates the aerosol optical properties, the submodel CLOUDOPT calculates the cloud optical properties, and the submodel ORBIT is responsible for Earth orbit calculations. These submodels are coupled via the standard MESSy infrastructure and are largely based on the original radiation scheme of …
Los balnearios de Castelló: el primer turismo conocido en el norte del País Valenciano
1988
EL ARTICULO ANALIZA EL ORIGEN Y EVOLUCION DE LOS BALNEARIOS DE LA MONTAÑA DE CASTELLO, Y SOBRE TODO, EL DE LA FONT D'EN SEGURES DE BENASSAL, QUE ES EL MAS IMPORTANTE DEL PAIS VALENCIANO, ATENDIENDO AL VOLUMEN DE VERANEANTES Y DE EMBOTELLAMIENTO DE AGUA. SUS PERIODOS DE CONSTRUCCION, LAS CARACTERISTICAS POBLACIONALES DEL LUGAR Y DE LOS AGUISTAS, EL MODO DE EXPLOTACION DEL MANANTIAL Y LAS CONSECUENCIAS SOCIO-ECONOMICAS QUE EL BALNEARIO OCASIONA, SON LOS PRINCIPALES APARTADOS ESTUDIADOS. (A)
Sesquiterpene lactones and dihydroflavonols from Andryala and Urospermum species
1994
Abstract The aerial parts of two Andryala species yielded several guaianolides and guaianolide glycosides, three of them being new. The aerial parts of Urospermum dalechampii yielded several known germacranolides and the new dihydroflavonol 3- O -methyltaxifolin.
Sensitivity of aerosol radiative effects to different mixing assumptions in the AEROPT 1.0 submodel of the EMAC atmospheric-chemistry–climate model
2014
Abstract. The modelling of aerosol radiative forcing is a major cause of uncertainty in the assessment of global and regional atmospheric energy budgets and climate change. One reason is the strong dependence of the aerosol optical properties on the mixing state of aerosol components, such as absorbing black carbon and, predominantly scattering sulfates. Using a new column version of the aerosol optical properties and radiative-transfer code of the ECHAM/MESSy atmospheric-chemistry–climate model (EMAC), we study the radiative transfer applying various mixing states. The aerosol optics code builds on the AEROPT (AERosol OPTical properties) submodel, which assumes homogeneous internal mixing …