LBA-ECO CD-02 C and N Isotopes in Leaves and Atmospheric CO2, Amazonas, Brazil
简介
本数据集报告了巴西亚马逊州马瑙斯附近亚马逊国家科学研究所 (INPA) ZF2 保护区 (34 公里) 原始森林叶片组织和大气二氧化碳 (CO2) 的 13C/12C 变化结果、叶片组织的 15N/14N 比值以及沿地形梯度的叶片碳氮浓度。2004 年和 2006 年旱季，研究人员在冠层不同高度采集了叶片样本，并在该梯度沿线三个位置的不同高度采集了大气空气瓶样本。此外，数据集还包含来自高原 KM34 塔的同步气象、大气 CO2 和 CO2 通量测量数据。本数据集包含 3 个逗号分隔的数据文件。
摘要
Data are presented in three comma-delimited ASCII files:
File #1: CD02_Gas_Samples_13C_2004_2006.csv
File #2: CD02_Foliar_13C_15N_2004_2006.csv
File #3: CD02_Met_and_flux_data_2004_2006.csv
File #1: CD02_Gas_Samples_13C_2004_2006.csv
Column Heading Units/format Description
1 Year YYYY Year in which samples were collected: 2004 or 2006
2 Month Month in which samples were collected: August = 8 or October = 10
3 Day Day of the month in which samples were collected
4 Time HH:MM Start of sample collection in local time. Local time is GMT -4
5 Flask Flask identification number for laboratory purposes
6 Position Location within the landscape: Valley, Slope, Plateau, and Campinarana
7 Sample_type Samples were collected in flasks and are either Atmospheric gas samples or Soil respiration samples collected from a 40 L chamber placed on the soil surface
8 Height m Height in meters above the ground at which the sample was collected for the atmospheric samples
9 conc_CO2 ppm Concentration of carbon dioxide in the flask samples in parts per million (ppm)
10 inv_conc_CO2 ppm-1 Inverse concentration of carbon dioxide in the sample calculated as 1/column 9
11 delta_13C_R1 parts per mil Isotopic ratio of 13C/12C in carbon dioxide referenced to PDB, measured on a continuous flow isotope-ratio mass spectrometer (Finigan Delta Plus) at CENA
12 delta_13C_R2 parts per mil 13C/12C ratio measured in second aliquot from the same sample where available
13 delta_13C_R3 parts per mil 13C/12C ratio measured in third aliquot from the same sample where available
14 delta_13C_Avg parts per mil Mean isotopic ratio of 13C/12C in carbon dioxide based on 1, 2, or 3 measurements
Missing data are represented as -9999
File #2: CD02_Foliar_13C_15N_2004_2006.csv
Column Heading Units/format Description
1 Year YYYY Year in which samples were collected: 2004 or 2006
2 Month Month in which samples were collected: August = 8 or October = 10
3 Day Day of the month in which samples were collected
4 Location Topographic location of sampling point: Valley, Slope, Plateau, and Campinarana or not reported. In 2006 Campinarana was added to the list as a forest type that only occurs at lower slope and valley locations.
5 Height m Height of sampling location in meters above ground level or not recorded
6 Sample_id Internal sample id
7 Sample_type Type of material sampled: leaves with mature and young leaves distinguished in 2006 or litter
8 Canopy_position Location within the canopy based on sample height: Canopy, Understory, Soil, or not identified
9 Species Species identification where noted: In 2004 species were identified only with local name where possible in 2006 species were identified with scientific names
10 Description Notations from original field notebooks
11 delta_15N per mil Isotopic ratio of 15N/14N in the leaf sample relative to atmospheric N, measured on a continuous flow isotope-ratio mass spectrometer (Finigan Delta Plus) at CENA
12 delta_13C per mil Isotopic ratio of 13C/12C in the leaf or litter sample referenced to PDB, measured on a continuous flow isotope-ratio mass spectrometer (Finigan Delta Plus) at CENA
13 conc_C percent Concentration of carbon in the leaf or litter sample measured by dry combustion and reported in percent by dry weight
14 conc_N percent Concentration of nitrogen in the leaf or litter sample measured by dry combustion and reported in percent by dry weight
15 C_to_N Mass based ratio of carbon to nitrogen in the leaf or litter sample calculated by dividing column 13 by column 14
16 Notes Comments from the field notebooks; no comment or missing comment = none
Missing data are represented as -9999
File #3: CD02_Met_and_flux_data_2004_2006.csv
Column Heading Units/format Description
1 Year YYYY Year in which data were collected: 2004 or 2006
2 DOY Day of the year (DOY) on which data were collected. For 2004, data were collected from day 195 = July 13 thru day 218= August 5. For 2006, data were collected from day 260=September 17 thru day 290=October 17
3 Time Sampling time in decimal hours. Time given is the end of the 30 minute sampling period
4 Temp_Air degrees C Air temperature in degrees Celsius
5 RH percent Relative humidity in percent
6 E_act kPa Actual water vapor pressure reported in kilopascals
7 E_sat kPa Saturated water vapor pressure in kilopascals
8 VPD kPa Vapor pressure deficit reported in kilopascals
9 F_CO2 umol/m2/s Carbon dioxide flux measured at 53 m height
10 CO2_conc ppm Atmospheric carbon dioxide concentration measured at 53 meters above ground level
11 u_star m/s Friction velocity measured at 53 meters above ground level in meters per second
Missing data are represented by -9999
All data were measured at the top of the KM34 tower at 53 meters above ground level. The tower is located on the plateau.
All data are averages from a 30 minute sampling period: For the meteorological data each sampling period included 60 measurements (scan time interval 30 seconds); for the flux data each sampling period includes 18,000 samples (scan time interval 0.1 seconds)
Site boundaries: (All latitude and longitude given in decimal degrees)
Site (Region) Westernmost Longitude Easternmost Longitude Northernmost Latitude Southernmost Latitude Geodetic Datum
Amazonas (Manaus) - ZF2 km 34 (Amazonas (Manaus)) -60.20910 -60.0000 -2.50000 -2.60900 South-American Datum, 1969 (SAD-69)
代码
!pip install leafmap
!pip install pandas
!pip install folium
!pip install matplotlib
!pip install mapclassify
import pandas as pd
import leafmap
url = "https://github.com/opengeos/NASA-Earth-Data"
df = pd.read_csv(url, sep="\t")
df
leafmap.nasa_data_login()
results, gdf = leafmap.nasa_data_search(
short_name="CD02_C_N_Isotopes_1097",
cloud_hosted=True,
bounding_box=(-60.21, -2.61, -60.0, -2.5),
temporal=("2004-08-02", "2006-10-21"),
count=-1, # use -1 to return all datasets
return_gdf=True,
)
gdf.explore()
leafmap.nasa_data_download(results[:5], out_dir="data")
引用
de Araujo, A.C., J.P.H.B. Ometto, A.J. Dolman, B. Kruijt, M.J. Waterloo and J.R. Ehleringer. 2012. LBA-ECO CD-02 C and N Isotopes in Leaves and Atmospheric CO2, Amazonas, Brazil. Data set. Available on-line [http://daac.ornl.gov ] from Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, U.S.A.
