Seasonal and Diurnal Variations in Atmospheric and Soil Air 14 CO 2 in a Boreal Scots Pine Forest
Bibliographic Data
| ID | 9243030 |
|---|---|
| Authors | Vesa Palonen (0000-0001-9589-7989), J Pumpanen, L Kulmala, I Levin, J Heinonsalo, T Vesala |
| Year | 2018 |
| Volume | 60 |
| Issue | 1 |
| Pages | 283-297 |
| Publication date | 2018-02-01 |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | Radiocarbon (JOURNAL) |
| Journal identifiers | ISSN: 0033-8222 • E-ISSN: 1945-5755 |
| Publisher | Cambridge University Press (CUP) (PUBLISHER) |
| DOI | 10.1017/rdc.2017.95 |
| OpenAlex | W2767749519 |
| Language | EN |
| Citations received | 1 |
| References cited | 40 |
We present a radiocarbon ( 14 C) dataset of tropospheric air CO 2 , forest soil air CO 2 , and soil CO 2 emissions over the course of one growing season in a Scots pine forest in southern Finland. The CO 2 collection for 14 C accelerator mass spectrometry (AMS) analysis was done with a portable, suitcase-sized system, using molecular sieve cartridges to selectively trap CO 2 . The piloting measurements aimed to quantify the spatial, seasonal and diurnal changes in the 14 C content of CO 2 in a northern forest site. The atmospheric samples collected above the canopy showed a large seasonal variation and an 11‰ difference between day and nighttime profiles in August. The higher Δ 14 C values during night are partly explained by a higher contribution of 14 C-elevated soil CO 2 , accumulating in the nocturnal boundary layer when vertical mixing is weak. We observed significant seasonal trends in Δ 14 C-CO 2 at different soil depths that reflected changes in the shares of autotrophic and heterotrophic respiration. Also the observed diurnal variation in the Δ 14 C values in soil CO 2 highlighted the changes in the origin of CO 2 , with root activity decreasing more for the night than decomposition
Alpine climate · Atmospheric sciences · Botany · Diurnal temperature variation · Radiocarbon dating · Scots pine · Seasonality · Soil respiration · Soil water · Taiga · Atmospheric and Environmental Gas Dynamics · Atmospheric chemistry and aerosols · Chemistry · Environmental Science · Soil Carbon and Nitrogen Dynamics · Ecology · Environmental Chemistry · Forestry · Geology · Soil Science
| Citations per year | 0.25 |
|---|---|
| Citation span | 2022 - 2022 (1) |
| Highly cited | No |