title: Spatial interactions in a modified Daisyworld model: Heat diffusivity and greenhouse effects.
abstract: In this work we investigate a modified version of the Daisyworld model, originally introduced by Lovelock and Watson to describe in a simple way the interactions between an Earth-like planet, its biosphere, and the incoming solar radiation. Here a spatial dependency on latitude is included, and both a variable heat diffusivity along latitudes and a simple greenhouse effect description are introduced in the model. We show that the spatial interactions between the variables of the system can locally stabilize the coexistence of the two vegetation types. The feedback on albedo is able to generate equilibrium solutions which can efficiently self-regulate the planet climate, even for values of the solar luminosity relatively far from the current Earth conditions.
authors.affiliation: Dipartimento di Fisica, Università della Calabria, Ponte P. Bucci Cubo 31C, 87036 Rende (CS), Italy.
authors.forename: T
authors.initials: T
authors.lastname: Alberti
authors.affiliation: Dipartimento di Fisica, Università della Calabria, Ponte P. Bucci Cubo 31C, 87036 Rende (CS), Italy.
authors.forename: L
authors.initials: L
authors.lastname: Primavera
authors.affiliation: INGV Istituto Nazionale di Geofisica e Vulcanologia, Sede di Cosenza, Rende (CS), Italy.|LESIA-Observatoire de Paris, 5 place Jules Janssen, 92190 Meudon, France.
authors.forename: A
authors.initials: A
authors.lastname: Vecchio
authors.affiliation: Dipartimento di Fisica, Università della Calabria, Ponte P. Bucci Cubo 31C, 87036 Rende (CS), Italy.|CNISM Unità di Cosenza, Ponte P. Bucci 31C, 87036 Rende (CS), Italy.
authors.forename: F
authors.initials: F
authors.lastname: Lepreti
authors.affiliation: Dipartimento di Fisica, Università della Calabria, Ponte P. Bucci Cubo 31C, 87036 Rende (CS), Italy.|ISAC/CNR Lamezia Terme (CZ), Italy.
authors.forename: V
authors.initials: V
authors.lastname: Carbone