Earth Observation, Public Health and One Health by Unknown

Author:Unknown
Language: eng
Format: epub
ISBN: 9781800621206
Published: 2022-04-09T02:00:00+00:00

Challenges and questions

Challenges associated with obtaining remote sensing data include:

1. Complex system involving environmental factors at multiple scales

Working at multiple spatial and temporal scales – like a small coastal bay and a significantly larger coastal area – in a constant manner over large areas and prolonged time periods can make assessing the association of NCV with environmental factors a challenge.

2. Potentially significant technical requirements

The environmental factors identified in the previous section might necessitate the use of different sensors to obtain data with sufficient spatial, temporal, and spectral resolution. For example, a space-based open ocean salinity sensor cannot map closer than a few hundred kilometers from the coast and there are no immediate satellite sensor deployments for measuring coastal SSS. Similarly, satellite-based wind products are not reliable close to the coast, although high-to-moderate-resolution satellite SAR images are being used on a regular basis. Few optical and radar satellite sensors can provide the high spatial and temporal resolution data essential to study dynamic coastal and tidal regimes that change at hourly increments (Grimes et al., 2014). Heavy precipitation events can decrease the salinity in estuaries and coastal areas and result in NCV growth. For example, V. parahaemolyticus increased at beaches subsequent to storm events by 155.7% at two distinct beaches in northern China (He et al., 2019). However, such meteorological events are difficult to measure with remote sensing technology.

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