Updated environmental indicators show the country’s greenhouse gas (GHG) emissions in 2019 showed no sustained reductions compared to 2005 levels but our glacier ice volumes are continuing to decrease, Stats NZ reports.
The indicator ‘greenhouse gas emissions’ measures New Zealand’s GHG emissions from 1990 to 2019, showing the trends for emissions, quantities of different types of emissions, and their main sources.
In 2019 New Zealand’s gross greenhouse gas emissions were 82.3 million tonnes of CO2-e, 0.2% lower than 2005 and 26.4% higher than 1990. Emissions were 2.2% higher than 2018.
Gross GHG emissions were mainly made up of carbon dioxide (45.5%), methane (42.1%), and nitrous oxide (10.2%). Continue reading
There is a real risk that focusing on methane will mean we take our foot off the accelerator of CO2 reductions – where we’ve traditionally had a pretty poor record, Professor Dave Frame and Dr Adrian Macey contend in article published by Newsroom and republished on the Victoria University of Wellington website.
Dave Frame is Professor of Climate Change and Director of the New Zealand Climate Change Research Institute at the university.
Dr Adrian Macey is an adjunct professor of the Institute and a fellow at the Institut d’études avancées de Nantes, France.
As 20,000 people get ready to converge on Glasgow for the next United Nations Climate Change Conference (COP26), there has been a flurry of reports and media coverage suggesting urgent action to reduce methane emissions is the best thing we can do for the climate right now.
A recent joint United States-European Union pledge on methane, which other countries are being encouraged to join, aims at a 30 percent reduction in methane by 2030. The argument is that because methane is very potent in the short term, reducing it now will give us a big hit on warming, or that it somehow buys time for reducing carbon dioxide (CO2). Continue reading
Overseer and farm greenhouse gas emissions are back in the news today. The need for the regulation of farmers to be underpinned by good science comes into the picture, too.
Robin Grieve, chairman of FARM (Facts about ruminant methane) issued a press release calling on politicians to wait for science to catch up with their rules, regulations and diktats. Regulators must not make the same mistake with farm greenhouse gas emissions as they did with Overseer, he said.
Councils and Government attempting to regulate farm activities without having the tools to measure what it is they are regulating, is a classic example of politicians running ahead of the science.
Our environment deserves better than having our politicians blundering their way along a regulatory path when they don’t really know what they are talking about or dealing with. “You can’t manage what you can’t measure” is a farm adage that our politicians would be well advised to learn from.
Overseer was never the tool for the job and the zest with which our politicians adopted it as a tool to regulate, despite knowing its deficiencies, should be concerning to any fair minded person who cares for the environment.
Farm greenhouse gases were subject to the same disregard by our politicians when some decades ago they adopted the CO2 equivalent system to quantify methane emissions, despite being told by the climate scientists at the time that it was not fit for purpose.
The CO2 equivalents system does not take in to account the cyclical nature of ruminant methane emissions which leads to it massively overstating the impact of methane emissions and renders it meaningless. To use this system at all is to deny science.
If improving water quality and stopping global warming are important to our politicians, Grieve concluded, they will call time on overzealous regulations that lack scientific credibility, and instead seek enduring solutions that are science based.
A post on the Point of Order blog today reports on concerns about the contribution of methane to climate change and to the research in New Zealand and Australia to find ways of reducing methane emissions in farm animals…
A warning bell sounded for New Zealand farmers when The Economist – in an editorial last week headed “It is not all about the CO2” – argued that carbon dioxide is by far the most important driver of climate change, but methane matters too.
The final sentence of the editorial reads, ominously:
“Methane should be given priority on the COP26 climate summit this November”.
NZ may fight its corner vigorously at the Glasgow summit, but the risk is that delegates there will seize on the thesis advanced by The Economist that methane is a more powerful greenhouse gas than carbon dioxide, and decide to target it harshly.
“Reduce methane emissions and you soon reduce methane levels; reduce methane levels and you reduce global warming”, says The Economist.
With NZ’s greenhouse gas emissions comprising about 49% methane, this country could be savaged by climate change warriors, while other countries could follow the European Union in contemplating a tariff regime, or what it calls a carbon border adjustment mechanism (CBAM), in which the price of imports reflect their carbon content. Such a mechanism, if adopted broadly, could severely penalise NZ agriculture exports. Continue reading
A Waikato trial’s discovery of a possible link between bulls’ genetics and the amount of methane they produce raises that New Zealand dairy farmers might be able to breed
The pilot trial, by artificial breeding companies LIC and CRV with funding from the New Zealand Agricultural Greenhouse Gas Research Centre, measured feed intake and methane emissions – in the form of burps – from 20 young bulls destined to father the next generation of New Zealand’s dairy cows.
LIC Chief Scientist Richard Spelman says results from the pilot trial are promising.
“Methane production primarily relates to how much an animal eats. We’ve accounted for this and we’re still seeing variation which suggests genetics plays a role in a dairy bull’s methane emissions – now we need more data to prove it.” Continue reading
Two statements from the Beehive have drawn attention to the government’s aims to tackle climate change, reducing emissions and paving the way for a carbon-free New Zealand.
One of the statements reminded us that the US is back in the business of joining other countries in efforts to combat climate change.
This came from Prime Minister Jacinda Ardern, who said she had joined President Biden at a virtual Leaders’ Summit on Climate hosted by the United States overnight.
The summit, held for Earth Day, brought world leaders together to galvanise efforts to reduce emissions this decade and keep the shared goal of limiting global warming to 1.5 degrees Celsius above pre-industrial levels within reach.
“New Zealand welcomes the United States’ international leadership on climate change and sees this summit as an important opportunity to work collectively to drive effective global action on climate change,” Jacinda Ardern said.
New Zealand was asked to specifically participate in the climate finance session of the Summit. Continue reading
Dr Sara Mikaloff-Fletcher, an atmosphere and ocean scientist at Niwa, has been appointed the scientific leader of a New Zealand-led $6 million project to find and reduce farming emissions
New Zealand will become the testing ground for an international space mission to detect, by satellite, methane emissions from animals’ stomachs anywhere in the world.
The 350kg satellite will have its mission control based in New Zealand after the Government contributed $26m to the mission. The location of the ground control centre in New Zealand is still to be announced.
It will be launched in 2022 and will be capable of focusing on swathes of farmland anywhere in the world, revealing how much methane is being released at higher resolutions than before. Continue reading
Approximately two-thirds of New Zealand’s regions recorded decreases in their total greenhouse gas emissions while one-third of regions increased their emissions between 2007 and 2018, Stats NZ said today.
Overall, this resulted in a reduction of just over 1% in New Zealand’s total greenhouse gas emissions between 2007 and 2018.
Changes to a region’s total emissions result from increases or decreases in emissions from industry and households.
Industrial emissions, from either primary industries, goods-producing industries, or service industries, can be affected by several factors, such as structural changes to the local economy, changes in technology, or efficiency gains, environmental-economic accounts manager Stephen Oakley explained.
Primary industries – especially dairying – were a significant factor in the increased emissions in Canterbury, Otago and Southland. Continue reading
The question of what would happen if all farm animals made way for crops and trees is addressed by Professor Sebastian Leuzinger, a plant ecologist at the Auckland University of Technology, in an article for Climate Explained, a collaboration between The Conversation, Stuff and the New Zealand Science Media Centre to answer the public’s questions about climate change.
A questioner asked how much difference could be made to New Zealand’s commitment under the Paris Agreement and its total greenhouse gas emissions if all cows and sheep were removed from the country and plants grown in their place – hemp, wheat, oats and so on.
The questioner went on:
Surely we could easily become carbon neutral if we removed all livestock? How much more oxygen would be produced from plants growing instead? How would this offset our emissions? And what if we returned the land the animals were on to native forests or even pine plantations?
The Science Media Centre has republished Professor Leuzinger’s article from The Conversation under a Creative Commons license. The original article can be read here. Continue reading
The Global Carbon Project (GCP) has released its latest analysis of the worldwide balance of methane emissions and sinks, showing emissions increased by 9% – or 50 million tons – from 2007 to 2017.
Human activities are responsible for about 60% of total methane emissions, most of the increase coming from the fossil fuel sector and the agriculture and waste sector.
The researchers say their report highlights the need for stronger mitigation in both areas.
The report updates a previous analysis published in 2016 as part of the GCP’s monitoring of global methane (CH4) sources and sinks to the atmosphere.
The latest study was conducted by an international research team and led by the Laboratoire des Sciences du Climat et de l’Environnement (LSCE, CEA-CNRS-UVSQ) in France, under the umbrella of the GCP which initiated the work. Two articles have been published in Environmental Research Letters and Earth System Science Data.
Methane is the second anthropogenic greenhouse gas after carbon dioxide (CO2). But methane has a warming potential 28 times higher than carbon dioxide (on a 100-year time horizon). Continue reading