abeylicious/lagos-maiduguri-climate
Domain:
climateRecord type:
dataset
Creator:
abe
Host:
20-year hydro-thermal climate analysis evaluating monthly thermal maximums in Maiduguri and precipitation dynamics in Lagos using TerraClimate in GEE.
# 🌡️ Subsaharan Africa Climate Dynamics Suite
This repository evaluates two decade-long (2006 to 2026) hydro-thermal climate profiles in Sub-Saharan Africa using **IDAHO_EPSCOR/TERRACLIMATE** high-resolution monthly climate data processed via Google Earth Engine (GEE).
The analysis evaluates two contrasting agro-ecological and climatic extremes in Nigeria:
* **Sudano-Sahelian Thermal Maximums (Maiduguri City, Borno State):** Tracking extreme monthly maximum (`tmmx`) and minimum (`tmmn`) temperature variations in an arid Northern urban hub.
* **Coastal Atlantic Precipitation Patterns (Lagos City, Lagos State):** Evaluating monthly cumulative rainfall dynamics (`pr`) in a tropical coastal megacity.
## 📊 Study Area Coordinates & Datasets
| Location | Coordinates (Lon, Lat) | Primary Metric Assessed | Dataset Used |
| :--- | :--- | :--- | :--- |
| **Maiduguri City** | `[13.1500, 11.8333]` | Monthly Max & Min Temp (°C) | TerraClimate (`tmmx`, `tmmn`) |
| **Lagos City** | `[3.3792, 6.5244]` | Monthly Total Precipitation (mm) | TerraClimate (`pr`) |
## 🔬 Processing Pipeline & Band Scaling
Raw TerraClimate temperature bands (`tmmx` and `tmmn`) are stored as integers with a scale factor of **0.1**. A custom transformation function applies the $0.1$ multiplier to convert raw values into actual degrees Celsius (°C):
```javascript
// Function to scale temperatures and isolate precipitation
var prepClimate = function(image) {
var maxTempC = image.select('tmmx').multiply(0.1).rename('temp_max_c');
var minTempC = image.select('tmmn').multiply(0.1).rename('temp_min_c');
var precip = image.select('pr').rename('precipitation_mm');
return image.addBands([maxTempC, minTempC, precip]);
};
```
## 📈 Visual Outputs & Time Series Trends
### 1. Maiduguri City Monthly Temperature (2006–2026)
### 2. Lagos City Monthly Precipitation (2006–2026)
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## 📌 Key Analytical Findings
### 🌡️ Maiduguri Thermal Dynamics (Sahelian Zone)
* **Extreme Seasonal Fluctuation:** Maximum temperatur …