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Screening variability and change of soil moisture under wide-ranging climate conditions: Snow dynamics effects.

Verrot L, Destouni G - Ambio (2015)

Bottom Line: Soil moisture influences and is influenced by water, climate, and ecosystem conditions, affecting associated ecosystem services in the landscape.Spatially, average intra-annual variability of soil moisture differs considerably between the basins due to their temperature-related differences in snow dynamics.With regard to temporal change, the long-term average state and intra-annual variability of soil moisture have not changed much, while inter-annual variability has changed considerably in response to hydro-climatic changes experienced so far in each basin.

View Article: PubMed Central - PubMed

Affiliation: Department of Physical Geography and Quaternary Geology, Stockholm University, 106 91, Stockholm, Sweden, lucile.verrot@natgeo.su.se.

ABSTRACT
Soil moisture influences and is influenced by water, climate, and ecosystem conditions, affecting associated ecosystem services in the landscape. This paper couples snow storage-melting dynamics with an analytical modeling approach to screening basin-scale, long-term soil moisture variability and change in a changing climate. This coupling enables assessment of both spatial differences and temporal changes across a wide range of hydro-climatic conditions. Model application is exemplified for two major Swedish hydrological basins, Norrström and Piteälven. These are located along a steep temperature gradient and have experienced different hydro-climatic changes over the time period of study, 1950-2009. Spatially, average intra-annual variability of soil moisture differs considerably between the basins due to their temperature-related differences in snow dynamics. With regard to temporal change, the long-term average state and intra-annual variability of soil moisture have not changed much, while inter-annual variability has changed considerably in response to hydro-climatic changes experienced so far in each basin.

No MeSH data available.


Boxplot of temperature (a, b) and other hydro-climatic variables: precipitation, runoff, evapotranspiration (c, d) for the periods 1950–1969 and 1990–2009. Results are shown for Norrström (a, c) and Piteälven (b, d)
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Fig3: Boxplot of temperature (a, b) and other hydro-climatic variables: precipitation, runoff, evapotranspiration (c, d) for the periods 1950–1969 and 1990–2009. Results are shown for Norrström (a, c) and Piteälven (b, d)

Mentions: Temporal change in different hydro-climatic variables is assessed by comparing the statistics of each variable across two 20-year climatic periods, from the beginning (1950–1969) to the end (1990–2009) of the whole study period (Fig. 3). Both basins have experienced warming (increased mean annual temperature T) of close to 1°C (somewhat less in Piteälven). Norrström has also experienced a relatively large increase in mean annual precipitation (P, by about 100 mm per year) while the runoff (R) has decreased over the same time (by 30 mm per year, due to even more increased ET; Destouni et al. (2013) have previously investigated increased ET in Norrström, explaining it as an effect of land- and water-use changes in this basin) (Fig. 3a). In Piteälven, P has only slightly increased between the two periods, while R has increased considerably more, implying that ET has here decreased between the periods (Fig. 3b). In both basins, inter-annual variability has most notably increased for R and decreased for ET (we refer to inter-annual variability as the 1.5 inter-quartile range on the boxplots).Fig. 3


Screening variability and change of soil moisture under wide-ranging climate conditions: Snow dynamics effects.

Verrot L, Destouni G - Ambio (2015)

Boxplot of temperature (a, b) and other hydro-climatic variables: precipitation, runoff, evapotranspiration (c, d) for the periods 1950–1969 and 1990–2009. Results are shown for Norrström (a, c) and Piteälven (b, d)
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

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getmorefigures.php?uid=PMC4289003&req=5

Fig3: Boxplot of temperature (a, b) and other hydro-climatic variables: precipitation, runoff, evapotranspiration (c, d) for the periods 1950–1969 and 1990–2009. Results are shown for Norrström (a, c) and Piteälven (b, d)
Mentions: Temporal change in different hydro-climatic variables is assessed by comparing the statistics of each variable across two 20-year climatic periods, from the beginning (1950–1969) to the end (1990–2009) of the whole study period (Fig. 3). Both basins have experienced warming (increased mean annual temperature T) of close to 1°C (somewhat less in Piteälven). Norrström has also experienced a relatively large increase in mean annual precipitation (P, by about 100 mm per year) while the runoff (R) has decreased over the same time (by 30 mm per year, due to even more increased ET; Destouni et al. (2013) have previously investigated increased ET in Norrström, explaining it as an effect of land- and water-use changes in this basin) (Fig. 3a). In Piteälven, P has only slightly increased between the two periods, while R has increased considerably more, implying that ET has here decreased between the periods (Fig. 3b). In both basins, inter-annual variability has most notably increased for R and decreased for ET (we refer to inter-annual variability as the 1.5 inter-quartile range on the boxplots).Fig. 3

Bottom Line: Soil moisture influences and is influenced by water, climate, and ecosystem conditions, affecting associated ecosystem services in the landscape.Spatially, average intra-annual variability of soil moisture differs considerably between the basins due to their temperature-related differences in snow dynamics.With regard to temporal change, the long-term average state and intra-annual variability of soil moisture have not changed much, while inter-annual variability has changed considerably in response to hydro-climatic changes experienced so far in each basin.

View Article: PubMed Central - PubMed

Affiliation: Department of Physical Geography and Quaternary Geology, Stockholm University, 106 91, Stockholm, Sweden, lucile.verrot@natgeo.su.se.

ABSTRACT
Soil moisture influences and is influenced by water, climate, and ecosystem conditions, affecting associated ecosystem services in the landscape. This paper couples snow storage-melting dynamics with an analytical modeling approach to screening basin-scale, long-term soil moisture variability and change in a changing climate. This coupling enables assessment of both spatial differences and temporal changes across a wide range of hydro-climatic conditions. Model application is exemplified for two major Swedish hydrological basins, Norrström and Piteälven. These are located along a steep temperature gradient and have experienced different hydro-climatic changes over the time period of study, 1950-2009. Spatially, average intra-annual variability of soil moisture differs considerably between the basins due to their temperature-related differences in snow dynamics. With regard to temporal change, the long-term average state and intra-annual variability of soil moisture have not changed much, while inter-annual variability has changed considerably in response to hydro-climatic changes experienced so far in each basin.

No MeSH data available.