Atmospheric 14C, the Ocean, and the Sun

题目：大气中的14C、海洋和太阳大气中二氧化碳的14C/12C比率变化很大，因为它们反映了上层大气中14C宇宙射线产生率的变化，以及气候相关的14C在各种地球碳库之间的重新分配。该奖项支持对德国松木年表中全新世早期木材的高精度14C测量，这将有助于改进对距今11,400日历年的14C/12C记录的定义。14C/12C变率的成因，如气候和太阳的影响，将在碳库模拟的帮助下识别和表征。反馈机制可能会发挥作用。1993年9月27日对当前千年材料的高精度测量也将用于了解气候因素。区域14C/12C差异和南北纬14C/12C梯度将被定义。将梯度纳入碳库模型将有助于更好地定义碳循环汇和碳源。

ATM-9310121 Stuiver, Minze University of Washington Title: Atmospheric 14C the Ocean, and the Sun The 14C/12C ratios of atmospheric CO2 are quite variable as they reflect changes in 14C cosmic-ray production rate in the upper atmosphere, as well as climate-dependent re-allocation of 14C between the various earth carbon reservoirs. This award supports high-precision 14C measurements of early Holocene wood from the German Pine chronology which will contribute to an improved definition of the 14C/12C record back to 11,400 calendar years before the present. Causal factors for 14C/12C variability such as climate and solar influences will be identified and characterized with the aid of carbon reservoir modeling. Feedback mechanisms may play a role. High-precisionSeptember 27, 1993 measurements of materials of the current millennium will also be utilized to understand climatic factors. Regional 14C/12C differences and North - South latitudinal 14C/12C gradients will be defined. Incorporating the gradients into carbon reservoir models will lead to a better definition of carbon cycle sinks and sources.