2017 年 4 月至 11 月北极碳飞机剖面(Arctic-CAP)月度采样一氧化碳 (CO)、二氧化碳 (CO2)、甲烷

举报
此星光明 发表于 2024/03/16 09:28:59 2024/03/16
【摘要】 ​简介ABoVE: Atmospheric Profiles of CO, CO2 and CH4 Concentrations from Arctic-CAP, 2017文件修订日期:2019-05-01数据集版本: 1数据集摘要本数据集提供了 2017 年 4 月至 11 月北极碳飞机剖面(Arctic-CAP)月度采样活动期间阿拉斯加和加拿大育空及西北地区上空大气一氧化碳 (CO)、二...

简介

ABoVE: Atmospheric Profiles of CO, CO2 and CH4 Concentrations from Arctic-CAP, 2017

文件修订日期:2019-05-01

数据集版本: 1

数据集摘要

本数据集提供了 2017 年 4 月至 11 月北极碳飞机剖面(Arctic-CAP)月度采样活动期间阿拉斯加和加拿大育空及西北地区上空大气一氧化碳 (CO)、二氧化碳 (CO2)、甲烷 (CH4) 和水蒸气浓度的原位机载测量值,以及气温、气压、相对湿度和风速值。观测数据以 10 秒为间隔取平均值,并报告样本数(N)和标准偏差。在这六次月度活动中的每一次活动中,飞越北极-北方脆弱性实验(ABoVE)区域的飞行都包括从地表到 6 千米高度的 25 个垂直剖面,所选位置是对常规长期垂直剖面、遥感数据和地面通量塔测量结果的补充。
这些数据是为北极-CAP 项目收集的,以捕捉北部高纬度碳循环的时空动态,作为 ABoVE 的一部分。

该数据集有一个 NetCDF (.nc) 格式的数据文件。

Arctic-CAP 飞行线路(橙色)对阿拉斯加的北极和北方地区以及加拿大的育空地区和西北地区进行了采样。月度活动从 4 月持续到 11 月,捕捉了 2017 年生长季节的碳动态。图钉标出了每个月活动期间获取的 25 个垂直剖面的位置。

作为 ABoVE 的一部分,收集这些数据是为了捕捉北部高纬度碳循环的时空动态。

项目:北极-北方脆弱性实验

北极-北方脆弱性实验(ABoVE)是美国国家航空航天局(NASA)陆地生态计划的一项野外活动,于 2016 年至 2021 年期间在阿拉斯加和加拿大西部进行。ABoVE 的研究将基于实地的过程级研究与机载和卫星传感器获得的地理空间数据产品联系起来,为提高分析和建模能力奠定了基础,而分析和建模能力是了解和预测生态系统反应及社会影响所必需的。

空间覆盖范围: 阿拉斯加和加拿大

上图 参考地点:

域:核心和扩展

州/地区: 加拿大阿拉斯加州、育空地区和西北地区阿拉斯加和加拿大育空及西北地区

网格单元:Ah000v000, Ah000v001, Ah001v001, Ah002v001

空间分辨率: 点位置。飞机速度为 170 海里/秒(87.5 米/秒)时,一个 10 秒平均间隔覆盖约 875 米的距离。

Site Westernmost Longitude Easternmost Longitude Northernmost Latitude Southernmost Latitude
Alaska and Canada -166.04539 -104.1124 71.287399 40.0387

数据文件信息

该数据集有一个 NetCDF (.nc) 格式的数据文件。

对于每个变量,在 2017-04-26 至 2017-11-05 期间的 55 次单独飞行中收集了 107 400 个观测值(10 秒平均值)。

表 1.  列出 55 次独特飞行及其各自活动和起止地点的汇总表。Flight_ID 格式为飞行开始的日期(YYYYMMDD)。请注意,开始和结束地点并不一定表示当天的完整飞行路径。

 

Campaign Flight ID lat_start lon_start  Start_loc lat_end lon_end End_loc
Transit flight 20170426 40.0391 -105.2322 Colorado 62.4684 -114.4433 Yellowknife
April-May 20170427 62.4702 -114.4493 Yellowknife 62.469 -114.4441 Yellowknife
20170428 62.4707 -114.4517 Yellowknife 68.3039 -133.4776 Inuvik
20170429 68.3033 -133.5016 Inuvik 64.8053 -147.8663 Fairbanks
20170430 64.805 -147.8816 Fairbanks 64.5093 -165.3624 Nome
20170501 64.5078 -165.4506 Nome 64.8219 -147.8505 Fairbanks
20170503 64.8044 -147.8827 Fairbanks 60.7129 -135.0704 Whitehorse
20170504 60.7172 -135.0731 Whitehorse 62.4704 -114.4502 Yellowknife
June 20170606 62.4657 -114.4295 Yellowknife 68.3039 -133.4776 Inuvik
20170607 68.3033 -133.5 Inuvik 64.806 -147.8651 Fairbanks
20170608 64.8032 -147.8849 Fairbanks 64.5114 -165.443 Nome
20170609 64.5083 -165.4497 Nome 64.8051 -147.8667 Fairbanks
20170613 64.8131 -147.8667 Fairbanks 64.8064 -147.8643 Fairbanks
20170614 64.8135 -147.866 Fairbanks 60.5655 -151.2556 Anchorage
20170618 59.6415 -151.4882 Anchorage 60.7152 -135.0678 Whitehorse
20170619 60.7121 -135.0692 Whitehorse 62.4681 -114.4402 Yellowknife
July 20170709 62.4708 -114.4522 Yellowknife 62.4697 -114.4434 Yellowknife
20170710 62.4704 -114.4504 Yellowknife 68.3035 -133.4927 Inuvik
20170712 68.3033 -133.4994 Inuvik 64.8215 -147.8513 Fairbanks
20170713 64.8035 -147.8843 Fairbanks 64.5127 -165.4405 Nome
20170714 64.508 -165.4503 Nome 64.8096 -147.8584 Fairbanks
20170717 64.8135 -147.866 Fairbanks 64.811 -147.8705 Fairbanks
20170718 64.8266 -147.8419 Fairbanks 64.8205 -147.8531 Fairbanks
20170719 64.2617 -146.0123 Fairbanks 60.7157 -135.0721 Whitehorse
20170721 60.7175 -135.0734 Whitehorse 62.4701 -114.4435 Yellowknife
August 20170817 56.6532 -111.2097 Fort McMurray 68.3038 -133.4824 Inuvik
20170818 68.3034 -133.4991 Inuvik 64.8203 -147.8535 Fairbanks
20170821 64.8134 -147.8662 Fairbanks 64.8082 -147.8609 Fairbanks
20170823 64.826 -147.8429 Fairbanks 64.5106 -165.444 Nome
20170824 64.7501 -164.3066 Quartz Creek 65.4121 -164.6727 Quartz Creek
20170826 64.5178 -165.43 Nome 64.5125 -165.441 Nome
20170827 64.5085 -165.4491 Nome 64.8219 -147.8504 Fairbanks
20170828 64.8121 -147.8686 Fairbanks 60.7146 -135.0712 Whitehorse
20170829 60.7179 -135.0737 Whitehorse 62.4699 -114.4435 Yellowknife
20170830 62.4702 -114.4493 Yellowknife 62.4691 -114.4448 Yellowknife
September 20170908 62.4656 -114.4292 Yellowknife 60.7135 -135.0665 Whitehorse
20170910 60.7186 -135.0742 Whitehorse 60.9571 -137.4537 Whitehorse
20170913 60.7178 -135.0737 Whitehorse 64.8206 -147.8529 Fairbanks
20170915 64.8128 -147.8672 Fairbanks 70.1957 -148.4543 Deadhorse
20170917 64.8137 -147.8656 Fairbanks 64.5112 -165.4482 Nome
20170918 64.5094 -165.4366 Nome 64.8093 -147.859 Fairbanks
20170921 64.8131 -147.8667 Fairbanks 64.8091 -147.8593 Fairbanks
20170924 64.8134 -147.8661 Fairbanks 64.8112 -147.8702 Fairbanks
20170927 64.8124 -147.868 Fairbanks 62.4685 -114.4421 Yellowknife
20170928 62.471 -114.4527 Yellowknife 55.1845 -118.8811 Grand Prairie
October-November 20171018 56.6532 -111.2067 Fort McMurray 62.4604 -114.442 Yellowknife
20171021 62.4658 -114.4297 Yellowknife 68.3036 -133.4895 Inuvik
20171022 68.3042 -133.4667 Inuvik 64.8215 -147.8512 Fairbanks
20171023 64.8126 -147.8676 Fairbanks 64.8077 -147.8766 Fairbanks
20171025 64.8039 -147.8836 Fairbanks 64.8091 -147.874 Fairbanks
20171031 64.8036 -147.8842 Fairbanks 64.8082 -147.8757 Fairbanks
20171101 64.8264 -147.8423 Fairbanks 64.8099 -147.8726 Fairbanks
20171102 64.8041 -147.8832 Fairbanks 60.7151 -135.0716 Whitehorse
20171104 60.7029 -135.0622 Whitehorse 55.1845 -118.8797 Grand Prairie
Transit flight 20171105 55.1845 -118.874 Grand Prairie 40.209 -104.9237 Colorado

数据文件变量 

Variable Units/format Description
altitude m.a.s.l. Sample altitude (GPS altitude) in meters above sea level
flight_id YYYYMMDD A unique number identifying each flight. The format is the date in YYYYMMDD on which the flight began. See Table 1.
CH4 nmol per mol Mole fraction of methane in dry air. Average of all measurements made in the time interval. Mole fraction reported in units of nanomole per mol (1e-9 mol per mol of dry air); equivalent to ppb (parts per billion). Fill value: -9999
CH4_nvalue Number of individual measurements used to compute reported value. Fill value: -9
CH4_stdv nmol per mol Standard deviation of all measurements made in the time interval. A value of 0 occurs when nvalue is equal to 1. The mole fraction reported in units of nanomole per mol (1e-9 mol per mol of dry air). Fill value: -9999
CH4_unc nmol per mol Estimated uncertainty of the reported value. May be a single average uncertainty value for the whole dataset. The mole fraction reported in units of nanomole per mol (1e-9 mol per mol of dry air). Fill value: -9999
CO2 umol per mol Mole fraction of carbon dioxide in dry air; average of all measurements made in the time interval. Mole fraction reported in units of micromole per mole (1e-6 mol per mol of dry air); equivalent to ppm (parts per million). Fill value: -9999
CO2_nvalue Number of individual measurements used to compute reported value. Fill value: -9
CO2_stdv umol per mol Standard deviation of all measurements made in the time interval. A value of 0 occurs when nvalue is equal to 1. The mole fraction reported in units of micromole per mole (1e-6 mol per mol of dry air); equivalent to ppm (parts per million). Fill value: -9999
CO2_unc umol per mol Estimated uncertainty of the reported value. May be a single average uncertainty value for the whole dataset. The mole fraction reported in units of micromole per mole (1e-6 mol per mol of dry air); equivalent to ppm (parts per million).Fill value: -9999
CO nmol per mol Mole fraction of carbon monoxide in dry air; average of all measurements made in the time interval. Mole fraction reported in units of nanomole per mol (1e-9 mol per mol of dry air); equivalent to ppb (parts per billion).
CO_nvalue Number of individual measurements used to compute reported value. Fill value: -9
CO_stdv nmol per mol Standard deviation of all measurements made in the time interval. A value of 0 occurs when nvalue is equal to 1. The mole fraction reported in units of nanomole per mol (1e-9 mol per mol of dry air). Fill value: -9999
CO_unc nmol per mol Estimated uncertainty of the reported value. May be a single average uncertainty value for the whole dataset. The mole fraction reported in units of nanomole per mol (1e-9 mol per mol of dry air). Fill value: -9999
H2O % Water vapor; Average of all measurements made in the time interval. Fill value: -9999
H20_nvalue Number of individual measurements used to compute reported value. Fill value: -9
H20_stdv % Standard deviation of all measurements made in the time interval. A value of 0 occurs when nvalue is equal to 1. Fill value: -9999
H2O_unc % Estimated uncertainty of the reported value. May be a single average uncertainty value for the whole dataset
latitude Decimal degrees Latitude at which air sample was collected
longitude Decimal degrees Longitude at which air sample was collected
T Degrees K Air temperature from the Vaisala instrument; average of all measurements made in the time interval. Not calibrated
T_nvalue Number of individual measurements used to compute reported value. Fill value: -9
T_stdv Degrees K Standard deviation of all measurements made in the time interval. A value of 0 occurs when nvalue is equal to 1
T_unc Degrees K Estimated uncertainty of the reported value. May be a single average uncertainty value for the whole dataset. Fill value: -9999
P Pa Air pressure; average of all measurements made in the time interval. Not calibrated. Measuring instrument: Picarro G2401
P_nvalue Pa Number of individual measurements used to compute reported value. Fill value: -9
P_stdv Pa Standard deviation of all measurements made in the time interval. A value of 0 occurs when nvalue is equal to 1. Fill value: -9999
P_unc Pa Estimated uncertainty of the reported value. May be a single average uncertainty value for the whole dataset. Fill value: -9999
profile_id A unique integer greater than 0 for each profile on each flight number; a value of 0 means that those data are not part of a profile 
RH % Relative humidity; average of all measurements made in the time interval. Not calibrated
RH_nvalue % Number of individual measurements used to compute reported value. Fill value: -9
RH_stdv % Standard deviation of all measurements made in the time interval. A value of 0 occurs when nvalue is equal to 1. Fill value: -9999
RH_unc % Estimated uncertainty of the reported value. May be a single average uncertainty value for the whole dataset. Fill value: -9999
time seconds since 1970-01-01T00:00:00Z Number of seconds since January 1, 1970 in UTC. Time-averaged values are reported at the beginning of the averaging interval 
time_components YMDHMS Calendar time components as integers. Times and dates are UTC. Time-averaged values are reported at the beginning of the averaging interval. Provided in the order: year, month, day, hour, minute, second  
time_decimal Decimal year in UTC. Time-averaged values are reported at the beginning of the averaging interval 
u m/s Eastward wind (Aspen instrument); Average of all measurements made in the time interval. Aircraft calibrated. Fill value: -9999
u_nvalue m/s Number of individual measurements used to compute reported value. Fill value: -9
u_stdv m/s Standard deviation of all measurements made in the time interval. A value of 0 occurs when nvalue is equal to 1. Fill value: -9999
u_unc m/s Estimated uncertainty of the reported value. May be a single average uncertainty value for the whole dataset. Fill value: -9999
v m/s Northward wind (Aspen instrument); Average of all measurements made in the time interval. Aircraft calibrated. Fill value: -9999
v_nvalue m/s Number of individual measurements used to compute reported value. Fill value: -9
v_stdv m/s Standard deviation of all measurements made in the time interval. A value of 0 occurs when nvalue is equal to 1. Fill value: -9999
v_unc m/s Estimated uncertainty of the reported value. May be a single average uncertainty value for the whole dataset. Fill value: -9999

用户说明:变量 "profile_id "用于识别飞行过程中属于垂直剖面的观测数据。大于 0 的唯一整数标识每次飞行的每个剖面(flight_id)。数值为 0 表示这些数据不属于垂直剖面的一部分。

 应用与推导

北极北方生态系统(ABE)的地表气温、海冰覆盖率和永久冻土的巨大变化可能会对关键生态系统服务和依赖于北极北方生态系统的人类社会产生重大影响。为了预测北极地区气候系统持续变化的结果,有必要通过了解空间变化和年际变化的驱动过程来了解北极地区生态系统的脆弱性。

这些数据有助于我们理解和预测二氧化碳和甲烷的陆地-大气交换模型,从而更好地理解这些温室气体对 ABE 的反馈作用。每次活动都在本图上方列出的约 25 个地点中的每个地点进行垂直剖面飞行。完成所有剖面图需要 6 个飞行日。

机载原位仪器 

Instrument Measurement frequency Measurement
Picarro G2401  2.4 seconds CH4, CO, CO2, and water vapor (H20), Air pressure (P)
Vaisala  1 Hz Relative humidity (RH), air temperature (T)
Aspen  1 Hz Eastward wind (u) and northward wind (v) speeds


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/raw/main/nasa_earth_data.tsv"
df = pd.read_csv(url, sep="\t")
df
 
leafmap.nasa_data_login()
 
 
results, gdf = leafmap.nasa_data_search(
    short_name="ABoVE_Arctic_CAP_1658",
    cloud_hosted=True,
    bounding_box=(-166.04, 40.04, -104.11, 71.29),
    temporal=("2017-04-26", "2017-11-05"),
    count=-1,  # use -1 to return all datasets
    return_gdf=True,
)
 
 
gdf.explore()
 
#leafmap.nasa_data_download(results[:5], out_dir="data")

数据连接

ABoVE: Atmospheric Profiles of CO, CO2 and CH4 Concentrations from Arctic-CAP, 2017

引用

Sweeney, C., and K. McKain. 2019. ABoVE: Atmospheric Profiles of CO, CO2 and CH4 Concentrations from Arctic-CAP, 2017. ORNL DAAC, Oak Ridge, Tennessee, USA. ABoVE: Atmospheric Profiles of CO, CO2 and CH4 Concentrations from Arctic-CAP, 2017, https://doi.org/10.3334/ORNLDAAC/1658

网址推荐

 0代码在线构建地图应用

https://sso.mapmost.com/#/login?source_inviter=nClSZANO

机器学习

https://www.cbedai.net/xg

【版权声明】本文为华为云社区用户原创内容,转载时必须标注文章的来源(华为云社区)、文章链接、文章作者等基本信息, 否则作者和本社区有权追究责任。如果您发现本社区中有涉嫌抄袭的内容,欢迎发送邮件进行举报,并提供相关证据,一经查实,本社区将立刻删除涉嫌侵权内容,举报邮箱: cloudbbs@huaweicloud.com
  • 点赞
  • 收藏
  • 关注作者

评论(0

0/1000
抱歉,系统识别当前为高风险访问,暂不支持该操作

全部回复

上滑加载中

设置昵称

在此一键设置昵称,即可参与社区互动!

*长度不超过10个汉字或20个英文字符,设置后3个月内不可修改。

*长度不超过10个汉字或20个英文字符,设置后3个月内不可修改。