MfE Data Service :: tag:data.mfe.govt.nz,2008-10:feed:data:mapstream=84379:category=301213:sort=rMinistry for the Environmenthttps://data.mfe.govt.nz//Greenhouse gas concentrations, trends, to 2022tag:data.mfe.govt.nz,2024-02:layers:1159752024-02-19T00:55:07.837854+00:00
<a class="kxThumbnail" href="https://data.mfe.govt.nz/table/115975-greenhouse-gas-concentrations-trends-to-2022/" title="Details for Greenhouse gas concentrations, trends, to 2022"><img src="https://assets.koordinates.com/kx-dandelion-live2-public/thumbs/layers/115975/398297/small.png" alt="Greenhouse gas concentrations, trends, to 2022 thumbnail"/></a><br />
<p>This indicator measures trends of atmospheric concentrations of the three main greenhouse gases (GHGs) associated with human activities for the specified periods to 2022: carbon dioxide (CO2, ppm) from 1972, methane (CH4, ppb) from 1989, and nitrous oxide (N2O, ppb) from 1996.A subset of observations taken at Baring Head near Wellington was used to report on seasonally adjusted annual trends for each greenhouse gas.</p>
<p>Variables:<br>
variable: Type of GHG (CO2, CH4, N20)<br>
term: Year is a term for including years in the linear model. Year2 is a term for including squared years in the linear model with a quadratic term.<br>
p_value: The two-sided p-value associated with the observed statistic<br>
slope: The estimated value of the regression term. Rise in y for every unit of x.<br>
conf_90_low: The lower bound (inclusive) of values that's very likely to include a population value with a 90 percent degree of confidence<br>
conf_90_high: The upper bound (inclusive) of values that's very likely to include a population value with a 90 percent degree of confidence<br>
intercept: intercept<br>
r_sqaured: A measure of how well the regression line approximates the actual data. The r_squared value represents the proportion of the variance for a dependent variable that’s explained by an independent variable in a regression model.<br>
sigma: sigma<br>
method: The type of trend test undertaken. Note that for methane a linear model with a quadratic term is used. For the Mann Kendall test we used a modified Mann Kendall test for autocorrelated data modifiedmk::mmkh()<br>
n: Number of data points included in trend calculation.<br>
note: Linear model analysis notes<br>
conf_66_low: The lower bound (inclusive) of values that's likely to include a population value with a 66 percent degree of confidence<br>
conf_66_high: The upper bound (inclusive) of values that's likely to include a population value with a 66 percent degree of confidence<br>
z_score: Z statistic after correcting for autocorrelated data<br>
tau: Mann-Kendall's Tau<br>
variance: variance after correcting for autocorrelated data<br>
trend_likelihood: A description of how strong/likely the trend result is. Trends are categorised use the p-value. Categories are based on Stats NZ likelihood scale, which is a subset of the categories used by the IPCC. The following table shows the p-values for the different categories.<br>
term left_break right_break left_open right_open<br>
<br>
1 Very likely 0.9 1 TRUE FALSE<br>
2 Likely 0.66 0.9 TRUE FALSE<br>
3 Indeterminate 0.33 0.66 FALSE FALSE<br>
4 Unlikely 0.1 0.33 FALSE TRUE<br>
5 Very unlikely 0 0.1 FALSE TRUE</p>
From: <a href="https://data.mfe.govt.nz/group/environmental-reporting/" title="Profile for Environmental Reporting">Environmental Reporting</a><br />
Added: 19 Feb 2024<br />
Greenhouse gas concentrations, to 2022tag:data.mfe.govt.nz,2024-02:layers:1159742024-02-19T00:51:34.901436+00:00
<a class="kxThumbnail" href="https://data.mfe.govt.nz/table/115974-greenhouse-gas-concentrations-to-2022/" title="Details for Greenhouse gas concentrations, to 2022"><img src="https://assets.koordinates.com/kx-dandelion-live2-public/thumbs/layers/115974/398296/small.png" alt="Greenhouse gas concentrations, to 2022 thumbnail"/></a><br />
<p>This dataset measures atmospheric concentrations of the three main greenhouse gases (GHGs) associated with human activities for the specified periods to 2022: carbon dioxide (CO2) from 1972, methane (CH4) from 1989, and nitrous oxide (N2O) from 1996.</p>
<p>A subset of observations taken at Baring Head near Wellington was used to report on monthly averages and seasonally adjusted annual trends for each greenhouse gas.</p>
<p>Variables:<br>
year: Year<br>
month: Month<br>
variable: Type of GHG (CO2, CH4, N2O)<br>
parameter: Description of what the value describes (mean, mean_fitted, seasonal_adjusted_mean, trend). mean = monthly mean, mean_fitted = monthly mean with any missing values interpolated, seasonal_adjusted_mean = mean_fitted - seasonal component of the STL, trend = STL value<br>
value: Concentration value<br>
unit: Units of measurement</p>
From: <a href="https://data.mfe.govt.nz/group/environmental-reporting/" title="Profile for Environmental Reporting">Environmental Reporting</a><br />
Added: 19 Feb 2024<br />
Deforestation by Territorial Authority, 2008–2014tag:data.mfe.govt.nz,2017-10:layers:894222017-10-12T23:57:11.922617+00:002017-10-12T23:48:44.038848+00:00
<a class="kxThumbnail" href="https://data.mfe.govt.nz/layer/89422-deforestation-by-territorial-authority-20082014/" title="Details for Deforestation by Territorial Authority, 2008–2014"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=89422.285661,style=auto/90x70.png" alt="Deforestation by Territorial Authority, 2008–2014 thumbnail"/></a><br />
<br /><strong>Updated with new data on 12 Oct 2017</strong><br />
<p>Percent of land deforested in each Territorial Authority unit from 2008–2014. New Zealand’s indigenous and exotic forests absorb carbon dioxide (CO2) from the atmosphere through photosynthesis and store the carbon as biomass and in the soil. On average, more than twice as much carbon per hectare is stored in New Zealand’s mature indigenous forests than in exotic forests planted for wood production. Regenerating indigenous forests are also an important store of carbon, adding carbon every year as they grow. Total carbon stored in exotic forests will fluctuate over decades as the forests grow from seedlings to mature trees, are harvested, and replanted. Because CO2 is the major driver of climate change, forests provide important mitigation services and help New Zealand meet its climate change commitments.<br>
More information on this dataset and how it relates to our environmental reporting indicators and topics can be found in the attached data quality pdf.</p>
From: <a href="https://data.mfe.govt.nz/group/environmental-reporting/" title="Profile for Environmental Reporting">Environmental Reporting</a><br />
Added: 12 Oct 2017<br />
Updated: 12 Oct 2017<br />