Questions tagged [climate-models]

Mathematical models used for studying the dynamics of climate systems or predicting future climates.

Filter by
Sorted by
Tagged with
0
votes
0answers
19 views

Providing Edgar emission using prep_chem_source for tracers (CO2-CH4)

I am working on CO2 and CH4 by WRF-CHEM, for providing my anthropogenic emission from Edgar data base, I'm going to use the Prep_chem_source App. I would like to use Edgar data emission (as my ...
0
votes
1answer
221 views

The Medieval Climatic Anomaly

Trying to understand this question, posted to me by a lecturer at University: "The Medieval Climatic Anomaly was distinctive in terms of the prevailing climates and forcing mechanisms operating ...
5
votes
4answers
5k views

Looking for evidence against some points raised in Ivar Giaever's speech on climate change

I just listened to Ivar Giaever's speech on the climate change, and he raised following points which seem significant to me: Temperature differences y/y are very small compared to natural variation ...
4
votes
1answer
65 views

What would the average temperature be if there were no greenhouse effect from water vapor? [closed]

CO2, methane and other gases contribute to the greenhouse effect. But most of the greenhouse effect is caused by water vapour in the atmosphere. There is always a lot average moisture present, but it ...
1
vote
0answers
66 views

How can we best objectively quantify climate change mitigation urgency? [closed]

Quantifying climate change mitigation urgency seems to have three aspects: (1) Green House Gas reduction targets required to meet a specific goal such as 2C. The first guesstimate seems to be zero ...
2
votes
1answer
77 views

Where can I get hourly ambient temperature for each county in United States?

Need temperature for 24 hours for each county of United States. Average values is ok, seasonal granularity welcome. I've been looking at nClimDiv datasets
1
vote
0answers
77 views

At what distance from a location does the average monthly climate significantly start to differ?

I am almost done creating an app that allows people to create a planting calendar based on garden journals created by people who live within a certain radius of a user. In those garden journals people ...
4
votes
0answers
36 views

Climate modelling: statistical downscaling or dynamical?

I would like to assess climate change impacts on Protected Areas (e.g. natural reserves, national parks) for Mediterranean countries. I found easily future data from several Global Circulation Models ...
13
votes
3answers
978 views

How is global greenhouse gas emission calculated?

I am sure there are different methodologies to arrive at such a number. Can someone in layman terms describe some of the most widely used and trusted methods and what data are used? Sorry I am outside ...
11
votes
2answers
226 views

Would a volcanic winter trigger an oceanic “spring”?

There is large amounts of observations supporting the effects of volcanic eruptions on climate: A long term subtle warming effect due to $\small\mathsf{CO_2}$ and a short term, but more intense ...
1
vote
0answers
138 views

Equatorial Bulge and its implications on the climate

How much of the variance in the climate is due to the equatorial bulge and how much sun radiation do we lose due to the equatorial bulge? I am interested in the variance both through time and ...
2
votes
2answers
193 views

On what basics, can scientists predict the effects of climate change?

I don't know much about the topic of climate change to be honest. However, I've been attending a number of talks recently on the topic. As someone who studies mathematical models and uncertainty ...
9
votes
2answers
206 views

What caused peak CO2 to rise, starting about 400,000 years ago?

This question assumes the accuracy of this (and similar) charts. Source of image. From the image, CO2 peaked at about 260, perhaps 265 ppm during the interglacial periods between 800,000 years ago ...
10
votes
2answers
209 views

With so many positive feedbacks accelerating global warming, how did the earth ever re-enter ice ages after it came out of one?

We hear a lot about positive feedbacks when it comes to global warming. For example: ice reflects solar radiation, so as the ice melts more solar radiation is absorbed which accelerates warming; ...
4
votes
1answer
98 views

Are there General Circulation Models that can simulate the atmosphere of Venus?

I would like to know what would happen with the atmosphere of Venus when it gets tidally locked, i.e. when one side would perpetually face the Sun. Probably a thermal low would be at the subsolar ...
0
votes
1answer
47 views

List some common metrics to analyze the atmospheric vertical motion?

Could you give me some basic understanding of how to analyze the atmospheric vertical motion? For example, could you list some basic metrics to diagnose the vertical motion? Like divergence, vertical ...
1
vote
1answer
331 views

Does WRF simulation use sigma or eta vertical coordinate system?

Could you tell me what the WRF's vertical coordinate system is? Sigma or eta? According to the User WRF Guide document, uses a terrain-following hydrostatic pressure coordinate while the WRF ...
0
votes
1answer
121 views

How to better understand the RIP-nomenclature used in the CMIP5 project?

I am a statistician working on a climatological downscaling project in the Caribbean Sea. I am just starting to learn about the CMIP5 GCM data project. I plan to download CMIP5 data from 6 climate ...
2
votes
0answers
28 views

Where can I find csv or json data on absolute global average temperature

I am essentially looking for a list of raw datasets without any processing. I can find anomaly datasets, but have had no luck with 100% unprocessed (other than averaging, of course) data. This data is ...
2
votes
2answers
142 views

Why rely on climate models as opposed to paleoclimate data?

Something I hear often from climate scientists, and indeed even politicians, is that we "don't understand climate change very well". And, I'm sure this is true since the climate is a complex adaptive ...
0
votes
1answer
145 views

Is there any natural phenomenon that can account for the 100 fold faster CO2 rate increase?

"Based on the best historical data that we have available CO2 is probably increasing at a rate at of least 100 times faster than at any time in the last 800,000 years." Pieter Tans lead scientist of ...
-3
votes
1answer
216 views

Could someone please validate the Holmes equation [closed]

Dr. Robert Holmes has converted the ideal gas law to T = P M / (ρ R) in this paper: (Molar Mass Version of the Ideal Gas Law Points to a Very Low Climate Sensitivity) with T = temperature P = near-...
2
votes
2answers
68 views

Is there evidence to suggest that the release of methane clathrates in permafrost regions will impact climate change?

We can see that there are large buildups of methane clathrates in permafrost regions. Climate scientist James Hansen has predicted that the release of the permafrost methane clathrates could cause ...
0
votes
0answers
50 views

What is difference between an atmospheric model and a climate model?

I am wondering the major differences been an Atmospheric model and a Climate model? For example, Regional Atmospheric Modeling System (RAMS) versus Regional Climate Modeling System (RegCM). I recently ...
0
votes
0answers
27 views

What would the weather patterns on Earth really be like if Earth were tidally locked to the sun? [duplicate]

This question is different from How would weather change on a tidally-locked terrestrial planet?. None of its answers answer my question. I think it's answer might even have wrong information as I ...
1
vote
1answer
111 views

What would happen if I installed distributed water fountains in all of the ocean's dead zones? [closed]

As every thalassologist knows, the ocean is filled with great streches of desert with no marine photosynthetic life. What would happen if, for each of these oceanic deserts, I densely filled them with ...
8
votes
4answers
5k views

Why has CO2 decreased in the history of the Earth?

I noticed that the $\ce{CO2}$ is actually decreasing in the eon time. My guess is lush vegetation or forests began to grow which absorbed the $\ce{CO2}$ by photosynthesis? Would anyone give me any ...
3
votes
1answer
87 views

What would be the sea level rise if all fossil fuel resources are burned?

Tokarska et al. (2016), a Nature article from a team of the University of Victoria, predicted a global temperature increase of 7±2.5°C and 17.2±2.5°C at the equator and at the poles ...
1
vote
1answer
66 views

How reliable is sea-ice concentration (fraction) data in ERA-Interim?

I am using sea-ice data from the European Reanalysis from ECMWF (ERA Interim), but some grid cells over land have sea-ice information. Not a big issue so far, because spatial discretization must ...
3
votes
1answer
162 views

Which greenhouse gas has the most influence over global warming?

Carbon dioxide is the gas everyone talks about because of how much we emit, but it is the most influential greenhouse gas ? I know there are a lot of other gasses are way more potent to retain heat ...
19
votes
5answers
5k views

Is it true that a butterfly flapping its wings can result in a tornado in a distant location?

I have heard that extreme storm events can be caused simply by a butterfly flapping its wings somewhere in a distant location. Is it true that such a small disturbance in the air in one location can ...
1
vote
1answer
135 views

Are we at the beginning of a Heinrich Event?

Does our current weather trend properly reflect a Heinrich Event? It seems like the drastic weather swings are what I would expect but I realize that is not definitive. I don't see the term bandied ...
2
votes
1answer
124 views

How can I create multi model ensemble from output of 3 CMIP5 models?

I have a output of 3 models of CMIP5, they are CCSM4, IPSL and MPI. I have two scenarios RCP 2.6 and RCP 8.5 for each model. I want to know that how can I create a multi model ensemble from these 3 ...
3
votes
1answer
104 views

Equations for Milankovitch Factors?

Are there equations for the radiative forcings of the three Milankovitch factors at any given time? Or a database of values?
0
votes
2answers
307 views

A guide to how climate change will affect different countries [closed]

Let's assume that the climate change won't be prevented. I'm looking for a guide to show how the climate change will affect different countries. Specifically, I'm interested in comparing following ...
10
votes
1answer
193 views

About the actual radiative impact of greenhouse gas emission over time

Say we will emit a certain amount of greenhouse gas over the next 50 years (e.g. 100 billion tons CO2-eq in total). What would happen if I implement a certain GHG mitigation effort to cut the same ...
10
votes
1answer
4k views

Does this peer-reviewed study (referenced in Forbes) contradict the accepted position that climate change is real?

This Forbes article from 2013 (archive link here) with the headline "Majority Of Scientists Skeptical Of Global Warming Crisis" gets brandied around a lot. It states that Only 36 percent of ...
1
vote
1answer
890 views

Understanding a diagram of Earth's radiation balance

Trying to understand this image. Can someone tell me if I have the right reasoning here: Sun has 100% SW shooting to earth 30% of that 100% is reflected by clouds 70% remains Of that 70%, 45% of that ...
4
votes
1answer
87 views

Are there natural-forcings climate projections over the 21st century?

CMIP5 offers natural-forcings-only simulations over 1850-2005, which allows comparison with the historical simulations, which allows us to show how anthropogenic forcings have affected the climate ...
1
vote
0answers
95 views

How can I convert a CERA-20C total precipitation dataset of "monthly means of daily means' (edmo) to mm/month?

I downloaded an edmo dataset of 1 ensemble of the cera-20c model. I want to convert these data, which are in [m], to mm/month. Further specifications: 0.125/0.125 grid, -29/30/-30/31 area. Example of ...
1
vote
0answers
26 views

Computation of absolute precipitation forecast from precipitation anomaly forecast in NOAA CFSv2

I am currently trying to use absolute precipitation forecasts for medium term range (3wk-2mth). As no models of NOAA have absolute precipitation on this timerange, my idea was to compute those ...
1
vote
2answers
279 views

Why is a future increase in solar luminosity by 10% supposed to have disastrous consequences for life on earth when the last 30% did not?

One remarkable thing about the climate history of earth is that despite the fact that solar luminosity was fully 30% lower in the beginning, temperatures were actually quite close to today. Since then ...
5
votes
3answers
4k views

Would adding sulfur dioxide to the atmosphere have a global cooling effect?

There is reasonable evidence to suggest that the Earth is warming. The most probable cause appears to be increased CO2 in the atmosphere, which has been reasoned about for quite some time. There ...
2
votes
2answers
192 views

where to download NASA-NEX daily downscaled datasets?

I'm looking to download a small geographic area of the CMIP5 models part of NASA-NEX dataset. Previously I relied on the Planet OS OpenNEX GDDP website which had a great tool for selecting geographic ...
4
votes
0answers
62 views

How is the vertical distribution of water vapor changing?

In this publication about data assimilation and observations (paywall alert) in the chapter General Concepts in Meteorology and Dynamics (by Andrew Charlton-Perez, William Lahoz, Richard Swinbank, ...
4
votes
2answers
4k views

Interpolate Gaussian grids to regular fixed grids using bilinear interpolation?

I want to regrid GCM data available on Gaussian grids to regular grids, say at 1 deg X 1 deg. How to do this using CDO or Python ...
4
votes
1answer
81 views

Uncertainty In ERA-Interim data

Greeting, What is the estimated uncertainty value in Temperature, relative humidity, U and V winds of ERA-Interim data?
0
votes
1answer
66 views

Creating regular grid for my data? [closed]

I have daily spatiotemporal data with covariates at 10 different locations. My question is is it possible to convert my data into a grid format?
3
votes
0answers
122 views

Do 360 day calendars affect climate models?

I was recently reading Zach Holman's blogpost on time and remembering that I've had to work with CMIP5 output that used a 360 day calendar, rather than a 365 day or a Greogrian (or Proleptic Gregorian)...
4
votes
1answer
200 views

Single-layer water content variables

In different reanalysis products (ERA 20C and NOAA/OAR/ESRL/PSD 20th Century daily data specifically) one can find the following variables: Total column water (ERA) Total column rain water (ERA) ...