Comprehensive atmospheric clarity analysis for landscape and astrophotography using CAMS aerosol optical depth, particle composition (dust, smoke, sea salt), particle size distribution (Ångström exponent), and visibility conditions.
Evaluates atmospheric clarity using satellite aerosol data. High scores indicate pristine air with excellent visibility for landscape photography. Smoke from wildfires significantly reduces score. Low scores may still offer warm-toned conditions from dust aerosols.
Use these as planning patterns, then adjust thresholds for your subject, season, and location.
The score combines multiple transparency signals that affect how distant subjects render in a photograph.
High clarity with low haze, smoke, dust, and humidity when mountains, skylines, or stars need contrast
Using visibility alone when aerosols or smoke may still flatten colour and detail
Clear sky and clear air are different conditions; photographers often need both.
Use the score to schedule landscape, cityscape, and night shoots that depend on clean air
Expecting a hazy day to produce crisp long-distance contrast because cloud cover is low
Atmospheric Clarity Score evaluates air transparency and visibility quality using CAMS satellite aerosol data and surface visibility measurements. The algorithm analyzes Aerosol Optical Depth (total atmospheric particle loading), particle composition (dust, smoke, sea salt), the Ångström exponent (particle size distribution), relative humidity, and cloud cover to quantify atmospheric clarity.
High scores indicate pristine air with excellent visibility, vivid colors, and sharp distant detail—ideal for landscape photography and astrophotography.
Plan distant-subject shoots when haze, smoke, dust, and humidity are least likely to flatten contrast.
Use clarity with darkness and cloud checks when stars or distant night detail matter.
Inspect aerosol optical depth (550nm) as one of the forecast signals behind Atmospheric Clarity Score.
Inspect dust aod (550nm) as one of the forecast signals behind Atmospheric Clarity Score.
Inspect smoke aod (550nm) as one of the forecast signals behind Atmospheric Clarity Score.
Inspect sea salt aod (550nm) as one of the forecast signals behind Atmospheric Clarity Score.
Inspect ångström exponent as one of the forecast signals behind Atmospheric Clarity Score.
Atmospheric Clarity Score is PhotoWeather's Pro-tier metric for forecasting air transparency and visibility quality, designed for landscape, cityscape, and astrophotographers who need pristine atmospheric conditions to capture sharp, colorful distant subjects and clear night skies. Atmospheric clarity—the absence of haze, smog, dust, and smoke—directly impacts image quality by determining how much light is scattered or absorbed as it travels through the air. On clear days, photographers can capture distant mountains, cityscapes, and stars with vivid colors and sharp detail, while hazy conditions dull colors, reduce contrast, and obscure distant features.
Standard visibility measurements provide some insight, but PhotoWeather's algorithm goes deeper by incorporating CAMS (Copernicus Atmosphere Monitoring Service) satellite aerosol data that quantifies atmospheric particle loading with scientific precision. Aerosol Optical Depth (AOD) at 550nm is the primary metric, measuring how much particulate matter blocks light—low values (under 0.05) indicate exceptionally clear air, while high values (above 0.3) suggest significant haze, smoke, or dust. Particle composition matters too: smoke from wildfires severely degrades clarity and produces muddy gray haze, sea salt aerosol from ocean spray creates coastal haze, and dust aerosol can either degrade clarity or produce warm-toned haze depending on concentration. The Ångström exponent reveals particle size distribution—small particles scatter more light and reduce clarity more than large particles. Relative humidity affects haze formation because water vapor can condense on aerosol particles and amplify their scattering effect. Cloud cover is factored in to distinguish between aerosol haze and cloud coverage.
Scores above 80% indicate excellent clarity with minimal atmospheric interference—perfect for capturing distant subjects with full color saturation and sharp detail. Landscape photographers typically set thresholds of 75-80% to catch days when mountain ranges, city skylines, and other distant features will be crisp and vibrant. Astrophotographers benefit from high clarity scores because less atmospheric interference means darker skies and more visible stars. This derived field is essential for photographers planning shoots around distant subjects or night skies, ensuring they chase conditions that deliver the transparency and sharpness their images demand.
In PhotoWeather, Atmospheric Clarity Score is shown from 0.0% to 100.0%. Use the guide above to choose a narrower range for your subject, season, and location.
Atmospheric Clarity Score combines forecast signals such as Aerosol Optical Depth (550nm), Dust AOD (550nm), Smoke AOD (550nm), Sea Salt AOD (550nm), Ångström Exponent into one photography planning cue. Use it as a shortlist, then check the individual fields before committing to a shoot.
Combines aurora activity with viewing conditions (darkness, cloud cover, visibility) to provide photography-ready aurora quality scores. Aurora activity is OVATION-aware from the compute step.
Evaluates atmospheric conditions for blue hour photography quality. Scores sky clarity, cloud type suitability (high thin clouds ideal), visibility, and calm conditions.
Predicts the chance of vivid red, orange, and pink sunrise or sunset color. Best when the sun has a clear opening near the horizon, some clouds are ready to catch the light, and low clouds are not blocking the show.
How likely fog is to form. High scores mean misty, atmospheric conditions for moody landscape and sunrise photography.
Atmospheric suitability for golden hour photography across extended time window around golden hour periods
Cloud formation suitability for colorful sunrise and sunset skies around golden hour
Analysis of cloud formations and atmospheric conditions for dramatic sky photography
Storm intensity analysis combining precipitation, wind conditions, atmospheric pressure, visibility, GFS simulated radar reflectivity, and wind shear for enhanced storm organization detection.
Frost formation probability combining temperature, dewpoint spread, cloud cover, and wind analysis
Dew formation probability combining overnight radiative cooling, surface temperature, moisture, and wind analysis
Probability of visible rainbow formation based on solar geometry and precipitation patterns
Analysis of coastal drama combining wave dynamics, wind-driven spray and atmospheric cloud structure for seascape photography.
Scores forecast sky quality for deep-sky, starscape, and nightscape photography using darkness, moon interference, clouds, atmospheric transparency, precipitation risk, and forecast confidence. This is not a Bortle class or site-darkness/light-pollution rating.
Scores Milky Way core / Galactic Center shootability using Galactic Center altitude plus dark, clear, transparent, moon-friendly forecast sky conditions. This is not a generic Milky Way band detector or site-darkness rating.
Likelihood of sun breaking through clouds creating dramatic rays and dappled light patterns. Best with partial cloud cover (40-70%) and some sunshine reaching the surface.
Quality of diffused light for portrait and product photography. High scores indicate soft, even lighting that minimizes harsh shadows - the 'giant softbox' effect.
Rates how visually interesting the clouds are - distinguishing dramatic formations from boring flat overcast. High scores indicate structured clouds with good light transmission.
How flat and boring the overcast is. HIGH scores indicate uniform gray sky with no breaks or texture - generally unfavorable for most photography. LOW scores indicate breaks, texture, or clearing.
Total aerosol optical depth at 550nm. Lower values indicate clearer skies and more vivid colours.
Horizontal visibility distance
Smoke component of aerosol optical depth (black carbon + organic matter). Indicates wildfire smoke or urban pollution affecting air quality and visibility.
Moisture content relative to saturation
Use Atmospheric Clarity Score with related photography weather fields to get alerts for your locations, subjects, and shooting windows.
Create a free account