RT info:eu-repo/semantics/article
T1 Temporal patterns of CO2 and CH4 in a rural area in northern Spain described by a harmonic equation over 2010-2016
A1 Fernández Duque, Beatriz
A1 Pérez Bartolomé, Isidro Alberto
A1 Sánchez Gómez, María Luisa
A1 García Pérez, María Ángeles
A1 Pardo Gómez, Nuria
K1 Upper Spanish plateau
K1 Greenhouse gases
K1 Series of harmonics
K1 Daytime
K1 Night-time
K1 2509.02 Contaminación Atmosférica
K1 2501 Ciencias de la Atmósfera
AB The present paper seeks to improve our knowledge concerning the evolution of CO2 and CH4 in terms of monthly trends, growth rate and seasonal variations in the lower atmosphere. Dry continuous measurements of CO2 and the CH4 mixing ratio were carried out over five and a half years (from 15 October 2010 to 29 February 2016) by multi-point sampling at 1.8, 3.7 and 8.3 m, using a Picarro analyzer at a rural site in the Low Atmosphere Research Centre (CIBA), on the upper Spanish plateau. Data were divided into diurnal and nocturnal records. The mathematical equation proposed to analyze the overall data was a harmonic one, comprising a polynomial (trend) and a series of harmonics (seasonal cycle). Amplitude was considered as a constant and variable term over time. Quite different behaviour was found between day and night measurements in both climate forcing agents. CO2 showed an accelerating trend in autumn, whereas CH4 trends were higher during the winter. Increasing growth rates were reported for CO2 and CH4 over the whole study period. Nocturnal CO2 amplitudes are higher than diurnal ones except in winter for both gases, and also in the autumn for CH4.
PB Elsevier
SN 0048-9697
YR 2017
FD 2017
LK https://uvadoc.uva.es/handle/10324/83065
UL https://uvadoc.uva.es/handle/10324/83065
LA eng
NO Science of The Total Environment, September 2017, vol. 593–594, p. 1-9.
NO Producción Científica
DS UVaDOC
RD 22-mar-2026