Least-squares estimates of thorium, particle, and nutrient cycling rate constants from the JGOFS North Atlantic Bloom Experiment
Abstract Least-squares estimates of rate constants for the cycling of thorium, total particulate material, PON, and POC are presented at three different times during the North Atlantic Bloom Experiment. The estimates are based on previously published data collected between 24 April and 30 May 1989 and include water column profiles between 100 and 400 m and sediment trap data at 150 m and 300 m. Rate constants are based on a particle cycling model with suspended small particles and rapidly sinking large particles. Conservation equations for POC, PON, total particle mass, 228 Th, and 234 Th in the large particle phase and conservation equations for POC and PON in the small particle phase are used as constraints in the least-squares problem. Rate constants are predicted for 100 and 33% trap efficiency scenarios. The 33% trapping efficiency scenario produces results that are consistent with the water column 234 Th budget. The lower trapping efficiency increases aggregation and remineralization rate constants. Rate constants increase during the course of the bloom, from 2±0.2 to 76±9 year −1 for aggregation, 156±17 to 524±74 year −1 for disaggregation, and 13 ± 1 to 77 ± 10 year −1 for remineralization. Over the course of the bloom, increases in predicted aggregation, disaggregation, and remineralization fluxes are also resolved.
원문보기 무료다운로드 유료다운로드
- 무료 원문 정보가 존재하지 않습니다.
유료 다운로드의 경우 해당 사이트의 정책에 따라 신규 회원가입, 로그인, 유료 구매 등이 필요할 수 있습니다. 해당 사이트에서 발생하는 귀하의 모든 정보활동은 NDSL의 서비스 정책과 무관합니다.
NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니 담기를 통하여 원문복사서비스 이용이 가능합니다.