 |
| Titel |
Defining the climatic signal in stream salinity trends using the Interdecadal Pacific Oscillation and its rate of change |
| VerfasserIn |
V. H. McNeil, M. E. Cox |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1027-5606
|
| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 11, no. 4 ; Nr. 11, no. 4 (2007-05-03), S.1295-1307 |
| Datensatznummer |
250009386
|
| Publikation (Nr.) |
 copernicus.org/hess-11-1295-2007.pdf |
|
|
|
|
|
| Zusammenfassung |
| The impact of landuse on stream salinity is currently difficult to separate
from the effect of climate, as the decadal scale climatic cycles in
groundwater and stream hydrology have similar wavelengths to the landuse
pattern. These hydrological cycles determine the stream salinity through
accumulation or release of salt in the landscape. Widespread patterns
apparent in stream salinity are discussed, and a link is demonstrated
between stream salinity, groundwater levels and global climatic indicators.
The Interdecadal Pacific Oscillation (IPO) has previously been investigated
as a contributory climatic indicator for hydrological and related time
series in the Southern Hemisphere. This study presents an approach which
explores the rate of change in the IPO, in addition to its value, to define
an indicator for the climate component of ambient shallow groundwater levels
and corresponding stream salinity. Composite time series of groundwater
level and stream salinity are compiled using an extensive but irregular
database covering a wide geographical area. These are modelled with respect
to the IPO and its rate of change to derive control time series. A example
is given of how a stream salinity trend changes when the decadal climatic
influence is removed. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|