Publication Details |
| Category | Text Publication |
| Reference Category | Journals |
| DOI | 10.1007/s00477-012-0658-x |
| Document | Shareable Link |
| Title (Primary) | Phase difference analysis of temperature and vegetation phenology for beech forest: a wavelet approach |
| Author | Carl, G.; Doktor, D.; Koslowsky, D.; Kühn, I.
|
| Source Titel | Stochastic Environmental Research and Risk Assessment |
| Year | 2013 |
| Department | CLE; BZF |
| Volume | 27 |
| Issue | 5 |
| Page From | 1221 |
| Page To | 1230 |
| Language | englisch |
| Keywords | Beech forest; Bivariate time series analysis; Coherence phase; Morlet wavelet;Normalized difference vegetation index;Remote sensing signal |
| UFZ wide themes | RU1; |
| Abstract | Temporal shifts in phenology or vegetation period of plants are seen as
indicators of global warming with potentially severe impacts on
ecosystem functioning. In spite of increasing knowledge on drivers, it
is of utmost importance to disentangle the relationship between air
temperatures, phenological events, potential temporal lags (phase
shifts) and time scale for certain plant species. Assessing the phase
shifts as well as the scale-dependent relationship between temperature
and vegetation phenology requires the development of a nonlinear
temporal model. Therefore, we use wavelet analysis and present a
framework for identifying scale-dependent cross-phase coupling of
bivariate time series. It allows the calculation of (a) scale-dependent
decompositions of time series, (b) phase shifts of seasonal components
in relation to the annual cycle, and (c) inter-annual phase differences
between seasonal phases of different time series. The model is applied
to air temperature data and remote sensing phenology data of a beech
forest in Germany. Our study reveals that certain seasonal changes in
amplitude and phase with respect to the normal annual rhythm of
temperature and beech phenology are coupled time-delayed components,
which are characterized by a time shift of about one year.
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| Persistent UFZ Identifier | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=13063 |
| Carl, G., Doktor, D., Koslowsky, D., Kühn, I. (2013): Phase difference analysis of temperature and vegetation phenology for beech forest: a wavelet approach Stoch. Environ. Res. Risk Assess. 27 (5), 1221 - 1230 10.1007/s00477-012-0658-x |
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