# WIA-ENE-055: Sea Level Rise Response
## PHASE 1 - Data Format Specification

**Version:** 1.0.0
**Status:** Standard
**Category:** Energy & Environment (ENE)

---

## Overview

This specification defines standardized data formats for sea level monitoring, coastal elevation data, and climate projections to enable interoperability between tide gauge networks, satellite systems, and coastal management platforms.

---

## 1. Tide Gauge Data Format

### 1.1 Station Measurement

```json
{
  "station_id": "string",
  "location": {
    "name": "string",
    "latitude": "number",
    "longitude": "number",
    "country": "string",
    "region": "string"
  },
  "measurement": {
    "timestamp": "ISO8601",
    "water_level_msl": "number",
    "datum": "string",
    "unit": "meters|feet",
    "quality_flag": "good|suspect|bad"
  },
  "trend": {
    "annual_rate": "number",
    "confidence": "number",
    "period": "string"
  },
  "metadata": {
    "instrument_type": "string",
    "calibration_date": "ISO8601",
    "data_source": "string"
  }
}
```

### 1.2 Field Definitions

- **station_id**: Unique identifier for the tide gauge station
- **water_level_msl**: Water level relative to Mean Sea Level
- **datum**: Reference datum (MLLW, MSL, NAVD88, etc.)
- **annual_rate**: Sea level rise rate in meters/year
- **confidence**: Statistical confidence level (0.0 to 1.0)

### 1.3 Example

```json
{
  "station_id": "NOAA-8638610",
  "location": {
    "name": "Virginia Key, FL",
    "latitude": 25.7314,
    "longitude": -80.1606,
    "country": "USA",
    "region": "Atlantic Coast"
  },
  "measurement": {
    "timestamp": "2025-12-25T14:30:00Z",
    "water_level_msl": 1.847,
    "datum": "MLLW",
    "unit": "meters",
    "quality_flag": "good"
  },
  "trend": {
    "annual_rate": 0.0031,
    "confidence": 0.95,
    "period": "1993-2025"
  },
  "metadata": {
    "instrument_type": "acoustic",
    "calibration_date": "2025-06-15T00:00:00Z",
    "data_source": "NOAA CO-OPS"
  }
}
```

---

## 2. Satellite Altimetry Data Format

### 2.1 Satellite Measurement

```json
{
  "satellite": "string",
  "mission": "string",
  "orbit": "number",
  "region": {
    "bounds": {
      "north": "number",
      "south": "number",
      "east": "number",
      "west": "number"
    },
    "grid_resolution": "number"
  },
  "measurement": {
    "timestamp": "ISO8601",
    "sea_surface_height": "number",
    "significant_wave_height": "number",
    "wind_speed": "number",
    "accuracy": "number",
    "unit": "meters"
  },
  "corrections": {
    "ionosphere": "number",
    "troposphere": "number",
    "tide": "number"
  }
}
```

### 2.2 Example

```json
{
  "satellite": "Jason-3",
  "mission": "TOPEX/Poseidon Follow-On",
  "orbit": 24856,
  "region": {
    "bounds": {
      "north": 26.5,
      "south": 25.0,
      "east": -79.5,
      "west": -81.0
    },
    "grid_resolution": 0.25
  },
  "measurement": {
    "timestamp": "2025-12-25T12:00:00Z",
    "sea_surface_height": 0.456,
    "significant_wave_height": 1.2,
    "wind_speed": 8.5,
    "accuracy": 0.033,
    "unit": "meters"
  },
  "corrections": {
    "ionosphere": 0.008,
    "troposphere": -0.012,
    "tide": 0.024
  }
}
```

---

## 3. Coastal Elevation Profile

### 3.1 Elevation Survey

```json
{
  "survey_id": "string",
  "location": "string",
  "survey_date": "ISO8601",
  "survey_method": "lidar|sonar|gps",
  "elevation_points": [
    {
      "distance_m": "number",
      "elevation_msl": "number",
      "latitude": "number",
      "longitude": "number"
    }
  ],
  "flood_threshold": "number",
  "datum": "string",
  "accuracy": "number"
}
```

### 3.2 Example

```json
{
  "survey_id": "COASTAL-2025-001",
  "location": "Miami Beach Waterfront",
  "survey_date": "2025-11-15T00:00:00Z",
  "survey_method": "lidar",
  "elevation_points": [
    { "distance_m": 0, "elevation_msl": 0.8, "latitude": 25.7907, "longitude": -80.1300 },
    { "distance_m": 50, "elevation_msl": 1.2, "latitude": 25.7908, "longitude": -80.1295 },
    { "distance_m": 100, "elevation_msl": 1.8, "latitude": 25.7909, "longitude": -80.1290 },
    { "distance_m": 200, "elevation_msl": 2.5, "latitude": 25.7911, "longitude": -80.1280 },
    { "distance_m": 500, "elevation_msl": 3.2, "latitude": 25.7916, "longitude": -80.1260 }
  ],
  "flood_threshold": 1.5,
  "datum": "NAVD88",
  "accuracy": 0.15
}
```

---

## 4. Sea Level Rise Projection

### 4.1 Projection Data

```json
{
  "projection_id": "string",
  "scenario": "RCP2.6|RCP4.5|RCP6.0|RCP8.5",
  "baseline_year": "number",
  "location": {
    "latitude": "number",
    "longitude": "number",
    "region": "string"
  },
  "projections": [
    {
      "year": "number",
      "sea_level_rise_m": "number",
      "confidence_low": "number",
      "confidence_high": "number"
    }
  ],
  "contributors": {
    "thermal_expansion": "number",
    "glaciers": "number",
    "greenland": "number",
    "antarctica": "number"
  }
}
```

### 4.2 Example

```json
{
  "projection_id": "IPCC-AR6-Miami",
  "scenario": "RCP8.5",
  "baseline_year": 2020,
  "location": {
    "latitude": 25.7617,
    "longitude": -80.1918,
    "region": "Southeast Florida"
  },
  "projections": [
    {
      "year": 2030,
      "sea_level_rise_m": 0.12,
      "confidence_low": 0.08,
      "confidence_high": 0.18
    },
    {
      "year": 2050,
      "sea_level_rise_m": 0.35,
      "confidence_low": 0.25,
      "confidence_high": 0.48
    },
    {
      "year": 2100,
      "sea_level_rise_m": 1.02,
      "confidence_low": 0.73,
      "confidence_high": 1.45
    }
  ],
  "contributors": {
    "thermal_expansion": 0.42,
    "glaciers": 0.18,
    "greenland": 0.25,
    "antarctica": 0.17
  }
}
```

---

## 5. Flood Risk Assessment

### 5.1 Risk Data Format

```json
{
  "assessment_id": "string",
  "location": {
    "address": "string",
    "latitude": "number",
    "longitude": "number",
    "elevation_msl": "number"
  },
  "scenario": "string",
  "timeframe": {
    "start_year": "number",
    "end_year": "number"
  },
  "risk_metrics": {
    "flood_probability": "number",
    "expected_inundation_depth": "number",
    "risk_level": "LOW|MODERATE|HIGH|EXTREME",
    "annual_flood_chance": "number"
  },
  "impacts": {
    "property_value_at_risk": "number",
    "infrastructure_affected": ["string"],
    "population_exposed": "number"
  }
}
```

### 5.2 Example

```json
{
  "assessment_id": "RISK-2025-MIA-001",
  "location": {
    "address": "1200 Ocean Drive, Miami Beach, FL",
    "latitude": 25.7850,
    "longitude": -80.1298,
    "elevation_msl": 1.2
  },
  "scenario": "RCP8.5",
  "timeframe": {
    "start_year": 2025,
    "end_year": 2050
  },
  "risk_metrics": {
    "flood_probability": 0.78,
    "expected_inundation_depth": 0.85,
    "risk_level": "HIGH",
    "annual_flood_chance": 0.031
  },
  "impacts": {
    "property_value_at_risk": 15000000,
    "infrastructure_affected": ["road", "utility", "building"],
    "population_exposed": 450
  }
}
```

---

## 6. Data Quality Standards

### 6.1 Quality Control

All sea level data must include quality flags:

- **GOOD**: Data meets all quality standards
- **SUSPECT**: Data shows anomalies but may be valid
- **BAD**: Data fails quality checks
- **MISSING**: No data available for time period

### 6.2 Accuracy Requirements

| Data Type | Minimum Accuracy | Preferred Accuracy |
|-----------|------------------|-------------------|
| Tide Gauge | ±5 cm | ±2 cm |
| Satellite Altimetry | ±5 cm | ±3 cm |
| Elevation Survey | ±20 cm | ±10 cm |
| Projections | N/A (confidence intervals required) | N/A |

### 6.3 Temporal Resolution

- **Real-time monitoring**: 1-minute intervals
- **Hourly data**: Standard for most applications
- **Daily means**: Climate trend analysis
- **Monthly means**: Long-term projections

---

## 7. Integration Requirements

### 7.1 Interoperability

Data formats must be compatible with:

- NOAA CO-OPS data standards
- NASA/JPL satellite data formats
- IPCC climate projection formats
- FEMA flood mapping standards

### 7.2 Data Exchange

Support for multiple exchange formats:

- **JSON**: Primary format for API exchanges
- **NetCDF**: Climate and oceanographic data
- **GeoJSON**: Spatial data representation
- **CSV**: Legacy system compatibility

---

## 8. Version History

| Version | Date | Changes |
|---------|------|---------|
| 1.0.0 | 2025-12-25 | Initial specification release |

---

**弘益人間 (홍익인간) · Benefit All Humanity**

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