Curitiba: the capital on the plateau, the mountains and the coast, read with one ruler
Six INMET stations in three regions: the metropolitan region (Curitiba and Colombo), the mountains and the Campos Gerais plateau (Ventania and Castro) and the coast (Morretes, at the foot of the Serra do Mar, and Ilha do Mel). What they and the satellite record: land use from 1985 to 2025, temperature and rain from 2000 to 2025, the surface heat island, the landslide and flooding risks read separately, the biodiversity recorded in GBIF, and protected areas. Santa Catarina is left out, as it is another state.
How to cite: Biondo, Leandro M. (2026). Curitiba: the capital on the plateau, the mountains and the coast, read with one ruler. UmaTerra. https://umaterra.com.br/en/stories/curitiba/
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—INMET stations used, in 3 regions measured
—change in urban area within 5 km of the metro-region stations, 1985–2025 measured
—°C of night-time surface heat island in the metro region, mean 2001–2025 measured
—years of valid data on the coast, the shortest series measured
measured by INMET, MapBiomas, MODIS, SRTM, GBIF or WDPA.
estimated a reading that depends on a choice (a threshold, a buffer, a model).
missing a part that did not respond this time.
1
Where the stations are
The metropolitan region (Curitiba and Colombo), the mountains and Campos Gerais plateau (Ventania and Castro), and the coast (Morretes and Ilha do Mel) have different sets of INMET stations, with series of different lengths. Pick a region to frame the map. Itapoá, Itajaí, Indaial and Rio Negrinho lie in Santa Catarina and are not included.
2
Forty years of land use, drag the bar
On the left, land use in 1985; on the right, in 2025, from MapBiomas’ annual mapping (Collection 11). The bar shows the same area at both dates: what changes shows along the line.
3
Four readings of the same territory
The buttons switch the layer on the map: land use in 2025, slope above 20°, valley floors, up to 10 m above the nearest river (HAND), and night surface temperature, mean 2016 to 2025. Each answers a different question, and none adds the others.
4
The four regions side by side
Same legend, same frame size. In the metro region the city grows over farmland. On the coast and in the mountains, forest returns where farming retreated.
5
Each place: the slider, the rings and the flow
Pick a station. The map shows its 5 km disc at both dates, with the bar between them. Below, the composition in rings of 1, 2, 5 and 10 km shows whether the change stays near the station or reaches farther. The flow diagram (sankey) shows where each 1985 class went.
6
Click a station, or choose one, and see its series
Each station has its own annual series of temperature, rain and apparent temperature, from months with at least 80% of data. The chart shows the chosen station’s series and its trend with the statistical test.
7
What changes in each region
To compare regions whose stations have different years, each station is compared with its own mean, and the mean of those differences becomes the regional line. Choose the variable.
8
The heat island, year by year
The difference between surface temperature in a 5 km disc and in a 20 to 30 km ring around each station, measured by MODIS. Drag the year and switch between day and night. Surface temperature is not air temperature, and the ring includes lowland and sea.
9
Landslide and flooding are not the same sum
Landslide depends mostly on relief; flooding depends on valley floors and the city. Regional heavy rain weighs on both, but it does not enter as a class in either. Choose the risk to see its layer and the table for each station. The class thresholds are choices, not measurements.
10
Who records biodiversity, and how much
Species records published in GBIF for each region and in 5 km discs around each station. Beyond volume, the table shows who sends them: how much of the output comes from the ten and the hundred most active names, and whether the observation is human or from collections.
11
How much of each region is in protected areas
The World Database on Protected Areas (WDPA, from UNEP-WCMC and IUCN), inside each region, and the forest of 1985 and 2025 inside and outside them. The comparison shows where the forest is; it does not measure the effect of protection.
12
Support and counterpoint in the literature
Sources on Curitiba describe long-term warming and more hot days since the 2000s, and heavy rain and urban flooding without a clear trend in the annual total. Our 2007–2025 data show a rise in maximum temperature and more heatwave months in the mountains, no clear rainfall trend in any region, and in the metro region a temperature trend that is not clear over the short period.
13
Rain in downpours and a shorter winter
In Curitiba many people say rain now comes concentrated and winter has grown shorter. Annual rain shows no clear trend; its spread through the year, with rain days and intensity, only appears in the daily series, which this story does not use.
14
The UmaTerra tools, and what each added
This reading uses three tools from the platform. If you research or write a report on an area, each can feed your work: biodiversity through GBIF, protected areas, and each place’s image through land use.
umaterra.com.br · Curitiba
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What this story does not say
It is not an official risk map. Landslide and flooding here are relief and valley-floor proxies, with chosen thresholds; they do not replace the municipal susceptibility map.
Few stations, short series. Ilha do Mel and Ventania have 8 years with data, and Colombo 9; each region’s trend rests on few series.
Surface temperature is not air temperature. The MODIS heat island measures what soil and roofs emit; the air version is smaller and different.
A published record is not effort. A region with many GBIF records may have few active observers; and the box includes sea.
Protected areas do not explain the forest. Being inside a unit does not prove the protection worked; the units sit on different relief and cover.
A station is not the whole city. Each station represents its immediate surroundings, and the difference between stations mixes altitude, distance to the sea and the city.
Perception is not measurement. The story describes what was recorded; what people feel needs its own source.
Written with Claude, by Anthropic, from INMET, MapBiomas, MODIS, SRTM, GBIF and WDPA data read through Earth Engine, the climate-shift database and UmaTerra’s own tools, and from the sources cited. No number was typed by hand: each comes from the builders in the story’s working folder.
References
Stations: INMET, stations table of the climate-shift database (6 stations used in 3 regions; Itapoá, Itajaí, Indaial and Rio Negrinho lie in Santa Catarina and are not included). Monthly series: monthly_summary_comprehensive table, with the completeness ratio of each month.
MapBiomas Collection 11, annual land-use mapping of Brazil, 1985–2025, read through Earth Engine (mapbiomas_brazil_collection11_coverage_v3). Brazil: brasil.mapbiomas.org.
Prefeitura de Curitiba (2019). Official information on mean temperature: 17.3 °C in 2019, about 1.2 °C above the mean of six decades before. (Check the city’s original report before citing the number; in Portuguese.)
Steadman, R. G. (1994). Norms of apparent temperature in Australia. Australian Meteorological Magazine, 43, 1–16. Used in its simplified form (monthly mean temperature, humidity and wind); it is an approximation, not the official heat index. (Check the title and volume.)
Wan, Z.; Hook, S.; Hulley, G. (2021). MOD11A2 MODIS/Terra Land Surface Temperature/Emissivity 8-Day L3 Global 1km, v061. DOI 10.5067/MODIS/MOD11A2.061. Surface temperature, not air temperature.
Farr, T. G. et al. (2007). The Shuttle Radar Topography Mission. Reviews of Geophysics 45, RG2004. DOI 10.1029/2005RG000183. 30 m relief (SRTM, USGS/SRTMGL1_003). Slope and valley floors are proxies, not a susceptibility map.
Literature cited in the text:
Prefeitura de Curitiba. Official news on rain in 2025 (days with rain). link (in Portuguese).
SBGFA (Unicamp). Trends in extreme rainfall from 1980 to 2010 and urban flooding in Curitiba. link (in Portuguese). Read from the title and abstract only; check the results.
Scientia Plena. Meteorological conditions and extreme daily temperature differences in the urban climate of Curitiba. link. Read from the title and abstract only.
Simepar. Rainfall is high because of the proximity to the ocean and the Serra do Mar, which favours storms (information cited in news; check the Simepar site).
GBIF.org. GBIF Occurrence Search API, aggregated counts (facets) of published records, 2000–2025, in each region’s box and in 5 km discs around the stations, queried with Naturametrics’ GBIF tool. Counts of published records, not field effort. gbif.org.
UNEP-WCMC and IUCN. Protected Planet: the World Database on Protected Areas (WDPA), current polygons (WCMC/WDPA/current/polygons) read through Earth Engine, for Brazil, inside each region’s box. Declared area (REP_AREA), not measured. protectedplanet.net.
UmaTerra tools used in this story: Naturametrics (GBIF tool), Yvynation (protected lands, same path as WDPA) and Camposcope (rural property analysis, not used in this version).