PPT-The cold water source and the role of tides on Guangdong

Coastal Upwelling in summer a numerical model study Kuang Fangfang Pan Aijun Zhang Junpeng Ocean Dynamics Laboratory Third Institute of Oceanography State Oceanic Administration TIOSOA. 3/18/12. What is water?. H. 2. O . Cohesion properties. Surface tension due to hydrogen boding. What are the factors that affect currents and tides?. 1) Heat (solar). 2) Salinity . 2) Wind (atmospheric interaction). High or Low - What Causes Tides?. Study Jams Video. What Are Tides?. Tides are the daily . rise. and . fall. of Earth’s . waters. on its coastlines. . As the tide comes . in. , the level of water on the beach . Moon-Earth Relationship. The . revolution. of the Moon around the Earth makes the Moon look as if it is changing shape in the sky.. This is caused by the different angles from which we see the lighted part of the Moon's surface.  . Overview. What is a Tide?. Types of Tides – Spring and Neap. High and Low Tides. Rule of Twelfths. Calculation of Tides at Secondary Ports. Calculation of Currents at Secondary Stations. Tide Races and Over falls . World Ocean. 3.1 The Waters of the Ocean. A. The Unique Nature of Pure Water. . All matter is made of atoms. Elements are make from one kind of atom. A molecule is two or more different atoms combined. Mean Low Tide versus Mean Lower Low Water. And the winner is……….!. Measuring Water Depths. Boats, Airborne LIDAR, Satellites, AUV’s/ROV’s – Differences?. Sensor Positioning. . GPS. Laser. How do we study them?. Have they always been here?. Oceanography. The scientific study of earth’s oceans. Ocean currents. Chemical composition. Seafloor sediments & topography. Marine life. How?. Datums. plus some NOS Resources. Marti . Ikehara. , Geodetic Advisor. NOAA’s NGS, Sacramento. Marti.ikehara@noaa.gov. CLSA Sonoma County chapter meeting, Feb 2013. 1. 12. King Tide, Humboldt Bay, Dec ‘12 event. their highest point of the day and fall to their lowest point . every 12.5 hours. . The tides result from the rotation of Earth on its axis as gravity . from the moon and the sun pull on Earth and its water. Think . What are tides?. Tides are the daily changes in the level of ocean water.. What causes tides?. Tides are caused by the difference in the gravitational force of the sun and the moon.. What is tidal force?. Study Jams Video. What Are Tides?. Tides are the daily . rise. and . fall. of Earth’s . waters. on its coastlines. . Tides . occur in . all . bodies of . water.. TidesTIDESThe periodic rise and fall of the sea level under the gravitational pull of the moon Tides are one of the most reliable phenomena in the world As the sun rises in the east and the stars come Chapter 14. Page 364 – 387. Currents. Imagine that you are stranded on a desert island. You stuff a distress message into a bottle & throw it into the ocean, hoping it will find its way to someone who will send help. . What is the ratio of freshwater to saltwater on earth?. A. 50% fresh: 50% salt. B. 30% fresh : 70% salt. C. 3% fresh: 97% salt. D. 50% fresh: 50% salt. C. 3% fresh: 97% salt. Another name for . dissolved salt .