LBA-ECO CD-10 CO2 AND H2O EDDY FLUXES AT KM 67 TOWER SITE, TAPAJOS NATIONAL FOREST

This data set reports eddy flux measurements of CO2 and H2O exchange and associated meteorological measurements at the Para Western (Santarem) - km 67, Primary Forest Tower Site. This site is in the Tapajos National Forest located in north central Brazil. Measurements extend from January 2002 through January 2006.Eddy fluxes of CO2 and H2O were measured at two levels (58m and 47m) using tower-mounted closed-path Licor 6262 gas analyzers and Campbell CSAT3 sonic anemometers (Figure 1). Eddy-flux measurements were made at a sampling rate of 8 Hz and averaged over a 1 hour interval.. A comprehensive set of meteorological parameters (air temperature, pressure, PAR, net radiation, precipitation, etc) were also measured.Co-located measurements included a third Licor gas analyzer that measured (a) the CO2 and H2O concentration profiles at 8 levels in and above the canopy (1 level every 2 minutes) and (b) the instantaneous integrated canopy storage of CO2 and H2O, using a design that pulled air simultaneously through all 8 inlets (once every 20 minutes). See related data sets.With the permission of the author, Hutyra, L.R. 2007. Carbon and water exchange in Amazonian rainforests. Ph.D. Thesis, Department of Earth and Planetary Sciences, Harvard University, Cambridge, Massachusetts., is included as a companion file.

本数据集报告了帕拉西部（圣塔伦）-67公里处原始森林塔站的CO₂与H₂O涡动通量测量数据，以及配套的气象观测数据。该站点位于巴西中北部的塔霍国家森林公园（Tapajos National Forest）内，观测时段为2002年1月至2006年1月。

研究采用架设于塔台的闭路式Licor 6262型气体分析仪与Campbell CSAT3型超声风速仪（图1），在两个观测高度（58米与47米）开展CO₂与H₂O的涡动通量观测。涡动通量采样频率为8赫兹，以1小时为间隔进行平均计算。同时还同步观测了一套完整的气象参数，包括气温、气压、光合有效辐射（PAR）、净辐射、降水量等。

同步配套观测包含第三台Licor气体分析仪，其观测内容包括：(a) 在林冠层及林冠上方共8个高度层测量CO₂与H₂O浓度廓线，每2分钟采集1组数据；(b) 采用每20分钟同时抽取全部8个进气口气流的设计，实时积分测量林冠层CO₂与H₂O的瞬时积分存储量。相关数据集详见配套资料。

经作者授权，以下文献作为附属文件一并提供：Hutyra, L.R. 2007年发表的《亚马逊雨林的碳与水交换》，哈佛大学地球与行星科学系博士学位论文，剑桥（马萨诸塞州）。