Italy
Mean Projections (CMIP6)
This page presents Italy's projected climate. The Mean Projections page offers CCKP's complete suite of indicators for in-depth analysis into future climate scenarios and potential risks due to changing climates. Data can be investigated as either the projected mean or anomaly (change) and is presented spatially, as a seasonal cycle, time series, or heat plot, which shows seasonal change over long-term time horizons. You can further tailor your analysis by selecting different projected time periods and Shared Socioeconomic Pathways (SSPs). SSPs are meant to provide insight into future climates based on defined emissions, mitigation efforts, and development paths.
Indicators are presented as multi-model ensemble, which represent the range and distribution of the most plausible projected outcomes of change in the climate system for a selected SSP. Individual models will be made available soon.
Climate projection data is modeled data from the global climate model compilations of the Coupled Model Inter-comparison Projects (CMIPs), overseen by the World Climate Research Program. Data presented is CMIP6, derived from the Sixth phase of the CMIPs. The CMIPs form the data foundation of the IPCC Assessment Reports. CMIP6 supports the IPCC's Sixth Assessment Report. Data is presented at a 0.25º x 0.25º (25km x 25km) resolution.
CCKP continues to add indicators as they are produced to complete currently available selection list.
01 - Mean Climate
What you can see in this figure
This map illustrates projected changes in various climate variables under different Shared Socioeconomic Pathways (SSPs), which are future climate scenarios. You can visualize these changes as either annual or seasonal shifts.
The data can be presented in two ways:
- Ensemble Anomaly: This shows the projected change relative to a historical period.
- Absolute Projected Climate Variable (mean): This displays the actual projected value of the climate variable, covering both the historical period and extending into the future.
The p10 and p90 values indicate the 10th and 90th percentile ranges among the different climate models in the multi-model ensemble, providing insight into the uncertainty or spread of projections.
Understanding the Data: Implications and Utility
These findings allow us to identify which seasons are experiencing the most significant changes, as well as regions undergoing more rapid or slower climatic shifts. The p10 and p90 values are crucial here, as they provide an indication of the agreement among different models regarding a particular change in a specific region. A narrower range between p10 and p90 suggests higher model consensus.
Understanding how temperature and precipitation vary in each region is essential for planning in sectors such as agriculture, water resource management, and flood risk mitigation. For instance, high temperatures combined with low rainfall can exacerbate drought, while intense rainfall following dry periods can increase flood risk due to reduced soil absorption.
Temperature changes will depend on topography, land cover, proximity to water bodies, and atmospheric circulation patterns. You'll often observe greater projected absolute warming in higher latitudes, particularly prominent in the Northern Hemisphere.
- Maximum temperatures (day temperatures) are particularly important for assessing heat stress, wildfire risk, and drought conditions. Heat stress is particularly relevant in urban areas where the heat island effect can intensify impacts.
- Minimum temperatures (night temperatures) are critical for human health (e.g., sleep quality), animal health, agricultural productivity (e.g., frost risk), and ecosystem stability.
We provide a set of complementary climate indicators that go beyond basic temperature and precipitation data. These include metrics such as the number of days exceeding critical heat and humidity thresholds, which are particularly relevant for sectors like agriculture, public health, and urban planning.
Recognizing that different regions have different sensitivities, we offer multiple threshold levels to reflect local priorities and vulnerabilities. For example:
- Number of hot days (e.g., days above 35°C) can indicate heat stress risks for outdoor labor.
- Number of tropical nights (e.g., nights above 26°C) is important for sleep quality and agricultural crops.
- Number of hot and humid days (e.g., high temperature combined with high humidity) highlights conditions that pose serious risks for heat-related illnesses.
It's important to note that precipitation is considerably more variable and complex than temperature, making it much harder to model and interpret, but the theoretical expectation for precipitation is that dry regions and dry seasons will become drier, while wet regions and wet seasons will become wetter. Extreme precipitation is posed to increase in most regions.
What are some caveats and potential limitations to consider?
These are global climate models, which inherently means they operate at a coarser resolution, even after bias correction and downscaling. This can limit their ability to capture highly localized phenomena or fine-scale regional variations in climate. Additionally, it's worth noting that precipitation variables are often more nuanced and challenging to model accurately than temperature.
SSP1-1.9: Sustainable Path (Very Low Emissions)
- World: Focuses on sustainability, global cooperation, and reduced inequality.
- Emissions: Very low; aims for warming well below 2°C (e.g., 1.5°C).
SSP1-2.6: Sustainable Path (Low Emissions)
- World: Similar to SSP1-1.9 in its sustainable societal development, but with slightly less aggressive mitigation.
- Emissions: It aims to keep global warming below 2°C. This still requires significant global cooperation and substantial emissions reductions, but not as rapid or deep as SSP1-1.9.
SSP2-4.5: Middle of the Road (Intermediate Emissions)
- World: Continues historical social and economic trends, with some progress but no dramatic shifts towards sustainability.
- Emissions: Intermediate; current trends continue, leading to moderate warming.
SSP3-7.0: Regional Rivalry (High Emissions)
- World: Characterized by fragmentation, nationalism, and declining cooperation, leading to slow development and high inequality.
- Emissions: High; limited climate action results in significant warming.
SSP5-8.5: Fossil-Fueled Development (Very High Emissions)
- World: Rapid, energy-intensive economic growth reliant on fossil fuels, with high technological advancement.
- Emissions: Very high; leads to severe warming due to continued fossil fuel reliance.
The number (e.g., 1.9, 4.5, 7.0, 8.5) refers to the radiative forcing (in Watts per square meter) by 2100, indicating the projected warming level. A higher number means more warming.
What you can see in this figure
This figure illustrates projected changes in various climate variables under different SSPs for each month and for a given spatial unit (to select on the plot above). You can select and deselect SSPs directly from the figure's legend.
The data can be presented in two ways (Calculation selection in the filters above):
- Ensemble Anomaly: This shows the projected change relative to a historical period for each month. This is the most correct scientific way of understanding multi-model changes.
- Absolute Projected Climate Variable (mean): This displays the actual projected value of the climate variable, covering both the historical period and extending into the future.
The p10 and p90 shading indicate the 10th and 90th percentile ranges among the different climate models in the ensemble, providing insight into the uncertainty or spread of monthly projections.
Understanding the Data: Implications and Utility
These findings allow us to identify which months are experiencing the most significant changes when compared to the historical seasonal cycle. The p10 and p90 values are crucial here, as they provide an indication of the agreement among different models regarding a particular change in a specific region. A narrower range between p10 and p90 suggests higher model consensus. While temperature variables are generally projected to trend towards greater warming, precipitation changes are often more complex and less straightforward to predict.
What you can see in this figure
This time series illustrates projected annual changes in various climate variables under different SSPs for a selected spatial unit.
The p10 and p90 shading indicate the 10th and 90th percentile ranges among the different climate models in the ensemble, providing insight into the uncertainty or spread of projections.
Understanding the Data: Implications and Utility
These time series let us see the long-term trend in temperature and precipitation, as well as the interannual variability. Keep in mind this variability is somewhat smoothed out because we're looking at the ensemble mean.
While temperatures generally show a clear warming trend, precipitation changes are often more complex and harder to predict. The p10 and p90 values are key here; they tell us how much the different models agree on a projected change in a specific area. A smaller gap between p10 and p90 means the models are more in sync. You'll also notice that the spread among models generally increases over time, reflecting growing uncertainty as we look further into the future. This spread combines both differences between models and natural year-to-year variability. The divergence in SSPs for some variables can be clearly seen from mid to the end of the century. This can be used to identify potential for 'avoided impacts', helping to clarify differences of conditions an areas will experience from a world with high fossil fuel use and warming to one with efforts on low emissions.
What are some caveats and potential limitations to consider?
It's crucial to note that the historical time series presented here are derived from CMIP6 models historical simulations, not actual observations. Therefore, they do not perfectly reflect the exact climate variability experienced in real observations. For real-world observations, please refer to other relevant tabs.
Within this specific tab, our focus is solely on CMIP6 models and their projections relative to their own historical simulations. This approach is the scientifically correct way to assess future climate change, as it consistently compares projected changes against the baseline established by the same models.
What you can see in this figure
This heat plot displays the difference between each decadal average period and the historical reference period (1995-2014). This is shown for every month, across various SSP warming scenarios, and for each spatial unit.
Understanding the Data: Implications and Utility
This visualization offers an intuitive way to quickly identify if certain months are projected to warm or dry faster than others, or to see similar comparative trends in other variables.
02 - Model Dispersion
In this figure, we present the dispersion across different CMIP6 models and scenarios. This dispersion illustrates how the projections can vary depending on the model used, reflecting the uncertainty and range of projections within the CMIP6 ensemble. Understanding this variability is crucial as it helps assess the robustness of the projected climate changes and highlights the differences in model behavior under various scenarios. By examining the spread of results, we can better understand the degree of consensus or divergence among models and make more informed decisions regarding climate projections and their potential impacts.
What you can see in this figure
This candlestick graph displays, for each 20-year period and scenario, the spread of CMIP6 model projections for a given variable. It highlights the median, the 10th and 90th percentiles, as well as the individual model results. You can click interactively to explore details for each model.
Understanding the Data: Implications and Utility
This dispersion reflects the uncertainty and range of projections within the CMIP6 ensemble. While early-century projections cluster more tightly, dispersion generally increases later in the century as internal variability accumulates and models diverge in their responses. By examining the spread of results, we can better understand the degree of consensus or divergence among models and make more informed decisions regarding climate projections and their potential impacts.
What you can see in this figure
In this figure, we present the correlation between historical temperature-related variables and precipitation-related variables across various CMIP6 models. We also incorporate ERA5 and CRU data where available.
Understanding the Data: Implications and Utility
Temperature and precipitation are closely interconnected, with changes in one often driving shifts in the other. For instance, rising temperatures affect evaporation and atmospheric moisture, altering precipitation patterns. Examining their correlation across CMIP6 models helps clarify the variability in climate projections, while comparing observations against model behavior guides the choice of observational datasets for more consistent model–data comparisons.
What are some caveats and potential limitations to consider?
It’s important to note that this analysis is not intended as a skill assessment but rather to explore the broader patterns of these correlations across different models.
What you can see in this figure
This figure shows the correlation between temperature- and precipitation-related anomalies across different CMIP6 future scenarios.
Understanding the Data: Implications and Utility
Temperature and precipitation are tightly connected in the climate system, with shifts in one often driving changes in the other. For instance, rising temperatures can alter evaporation and atmospheric moisture, influencing precipitation patterns. Examining their correlation across CMIP6 models is key to understanding future changes—for example, whether models that project wetter conditions also tend to project warmer ones.
What are some caveats and potential limitations to consider?
It’s important to note that this analysis is not intended as a skill assessment but rather to explore the broader patterns of these correlations across different models.