ATMOSPHERIC BIRCH (BETULA) POLLEN IN EUROPE - TRENDS AND FLUCTUATIONSIN ANNUAL QUANTITIES AND THE STARTING DATES OF THE SEASONS

Authors
SPIEKSMA FTM EMBERLIN JC HJELMROOS M JAGER S LEUSCHNER RM
Citation
Ftm. Spieksma et al., ATMOSPHERIC BIRCH (BETULA) POLLEN IN EUROPE - TRENDS AND FLUCTUATIONSIN ANNUAL QUANTITIES AND THE STARTING DATES OF THE SEASONS, Grana, 34(1), 1995, pp. 51-57
Citations number
NO
Categorie Soggetti
Plant Sciences
Journal title
Grana → ACNP
ISSN journal
00173134
Volume
34
Issue
1
Year of publication
1995
Pages
51 - 57
Database
ISI
SICI code
0017-3134(1995)34:1<51:AB(PIE>2.0.ZU;2-#
Abstract
Long term observations of atmospheric pollen offer the possibility of studying patterns in fluctuations in the airborne pollen presence. In this study, birch pollen measured at five monitoring stations in Europ e with records of 18 to 30 years, have been analysed comparatively on three aspects: trends and fluctuations of annual sums of daily concent rations, and starting dates of airborne presence. The results show wea kly rising trends at all five stations. The observed fluctuations in a irborne birch pollen quantities are suggestive of synchronous, alterna tingly cyclic rhythms, belt with a-synchronous aberrant years and phas e shifts. For the starting dates of the birch pollen season the air te mperature during the preceding 4 decades-of-days are of decisive impor tance.